Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 1 Of 14 (Convertible)

• EFI-112: Fault In Engine Control Module (ECM). Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-112
  • Intermittent fault
    • Notes
    • Erasing diagnostic trouble code (DTC)
    • Information
      • Fault-tracing information
• EFI-112: Fault In Engine Control Module (ECM). Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-112
  • Permanent fault
    • Notes
    • Replacing component
    • Information
      • Fault-tracing information
    • Replacing control module
    • Erasing diagnostic trouble codes (DTCs) and resetting adaptive functions
• EFI-115: Injector 1; Signal Missing. Intermittent Fault. (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
    • EFI-115: Injector 1; EFI-125 Injector 2; EFI-135 Injector 3; EFI-145 Injector 4; EFI-155 Injector 5;
  • Signal missing. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-115: Injector 1; Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Permanent fault
    • Notes
    • Checking power cable
    • Checking for an open-circuit
    • Checking the signal cable
    • Checking injector
    • Checking for contact resistance and oxidation
    • Replacing component
    • Checking control module connector
    • Fault-tracing information
    • Verification
      • Fault-tracing information
      • Verifying injector 1
      • Verifying injector 2
      • Verifying injector 3
      • Verifying injector 4
      • Verifying injector 5
    • Information
      • Fault-tracing information
• EFI-115: Injector 1; Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-115: Injector 1; Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Permanent fault
    • Notes
    • Checking injector
    • Checking for a short-circuit
    • Replacing component
    • Verification
      • Fault-tracing information
      • Verifying injector 1
      • Verifying injector 2
      • Verifying injector 3
      • Verifying injector 4
      • Verifying injector 5
    • Information
      • Fault-tracing information
• EFI-115: Injector 1; Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-115: Injector 1; Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Permanent fault
    • Notes
    • Checking the signal cable
    • Verification
      • Fault-tracing information
      • Verifying injector 1
      • Verifying injector 2
      • Verifying injector 3
      • Verifying injector 4
      • Verifying injector 5
    • Information
      • Fault-tracing information
• EFI-121: Mass Air Flow (MAF) Sensor. Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-121
    • EFI-121: Mass air flow (MAF) sensor, signal
  • Signal too high. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-121: Mass Air Flow (MAF) Sensor. Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-121
  • Signal too high. Permanent fault
    • Notes
    • Checking power ground
    • Checking control module connector
    • Checking for an open-circuit
    • Checking signal ground
    • Checking the signal cable
    • Checking for a short-circuit
    • Checking mass air flow (MAF) sensor signal
    • Checking for contact resistance and oxidation
    • Replacing component
    • Checking mass air flow (MAF) sensor
    • Fault-tracing information
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-121: Mass Air Flow (MAF) Sensor. Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-121
  • Signal too low. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-121: Mass Air Flow (MAF) Sensor. Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-121
  • Signal too low. Permanent fault
    • Notes
    • Checking fresh air intake
    • Corrective action
    • Checking power cable
    • Checking for an open-circuit
    • Checking the signal cable
    • Checking for a short-circuit
    • Checking mass air flow (MAF) sensor signal
    • Checking for contact resistance and oxidation
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-123: Engine Coolant Temperature (ECT) Sensor. Faulty Signal. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-123
  • Faulty signal. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Replacing component
    • Information
      • Fault-tracing information
• EFI-123: Engine Coolant Temperature (ECT) Sensor. Faulty Signal. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-123
  • Faulty signal. Permanent fault
    • Notes
    • Checking engine coolant temperature (ECT) sensor signal
    • Replacing component
    • Checking engine coolant temperature (ECT) sensor
    • Checking control module connector
    • Fault-tracing information
    • Checking for a short-circuit
    • Checking ground lead
    • Checking for an open-circuit
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-123: Engine Coolant Temperature (ECT) Sensor. Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-123
  • Signal too high. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-123: Engine Coolant Temperature (ECT) Sensor. Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-123
  • Signal too high. Permanent fault
    • Notes
    • Checking ground lead
    • Checking the signal cable
    • Checking for a short-circuit
    • Checking control module connector
    • Fault-tracing information
    • Checking for an open-circuit
    • Checking temperature sensor resistance
    • Checking for contact resistance and oxidation
    • Replacing component
    • Checking engine coolant temperature (ECT) sensor
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-123: Engine Coolant Temperature (ECT) Sensor. Signal Too Low. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-123
  • Signal too low. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-123: Engine Coolant Temperature (ECT) Sensor. Signal Too Low. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-123
  • Signal too low. Permanent fault
    • Notes
    • Checking the signal cable
    • Replacing component
    • Checking for a short-circuit
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-123, EFI-411 And EFI-251 Or EFI-314. Faulty Signal (B5234T3; B5254T; 1998)
  • Checking common ground terminal
    • Notes
    • Information
      • Overview
      • Fault-tracing information
    • Checking for an open-circuit, contact resistance and oxidation
    • Verification
      • Verification
  • Diagnostic trouble code (DTC) information EFI-123, EFI-411 and EFI-251 or EFI-314
    • Notes
    • Diagnostic trouble code (DTC) information EFI-123
      • EFI-123: Engine coolant temperature (ECT) sensor, signal
• EFI-125: Injector 2; Intermittent Fault, Signal Too High (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Intermittent fault
• EFI-125: Injector 2; Signal Missing. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Intermittent fault
• EFI-125: Injector 2; Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Permanent fault
• EFI-125: Injector 2; Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Permanent fault
• EFI-125: Injector 2; Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Intermittent fault
• EFI-125: Injector 2; Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Permanent fault
• EFI-131: Engine Speed (Rpm) Sensor; Intermittent Fault, Signal Missing (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-131
    • EFI-131: Engine speed (RPM) sensor, signal missing
  • Signal missing. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-131: Engine Speed (Rpm) Sensor; Permanent Fault, Signal Missing (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-131
  • Signal missing. Permanent fault
    • Notes
    • Checking engine speed (RPM) sensor resistance
    • Replacing component
    • Checking ground lead
    • Checking engine control module (ECM) ground terminals
    • Checking for an open-circuit
    • Checking signal cable resistance to ground
    • Checking for a short-circuit
    • Checking control module connector
    • Fault-tracing information
    • Checking for a short-circuit to supply voltage in signal cable
    • Checking the engine control module (ECM) connector
    • Checking for contact resistance and oxidation
    • Checking for damage
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-132: Battery Voltage. Voltage Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-132
    • EFI-132: Battery voltage
  • Voltage too high. Intermittent fault
    • Notes
    • Replacing component
    • Information
      • Fault-tracing information
• EFI-132: Battery Voltage. Voltage Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-132
  • Voltage too high. Permanent fault
    • Notes
    • Checking charging system
    • Information
      • Fault-tracing information
• EFI-132: Battery Voltage. Voltage Too Low. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-132
  • Voltage too low. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-132: Battery Voltage. Voltage Too Low. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-132
  • Voltage too low. Permanent fault
    • Notes
    • Checking battery voltage
    • Checking for contact resistance and oxidation
    • Fault-tracing information
    • Information
      • Fault-tracing information
• EFI-135: Injector 3; Signal Missing. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Intermittent fault
• EFI-135: Injector 3; Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Permanent fault
• EFI-135: Injector 3; Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Intermittent fault
• EFI-135: Injector 3; Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Permanent fault
• EFI-135: Injector 3; Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Intermittent fault
• EFI-135: Injector 3; Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Permanent fault
• EFI-143: Front Knock Sensor (KS). Faulty Signal. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-143, 433
  • Faulty signal. Intermittent fault
    • Notes
    • Checking the signal cable
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-143: Front, Knock Sensor (KS). Faulty Signal. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-143, 433
  • Faulty signal. Permanent fault
    • Notes
    • Checking ground lead
    • Checking control module connector
    • Fault-tracing information
    • Checking for an open-circuit
    • Checking the signal cable
    • Checking for a short-circuit
    • Checking front knock sensor (KS) signal
    • Checking rear knock sensor (KS) signal
    • Checking for contact resistance and oxidation
    • Replacing component
    • Verification
      • Verification
      • Verification, continued
    • Information
      • Fault-tracing information
• EFI-145: Injector 4; Permanent Fault, Signal Too Low (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Permanent fault
• EFI-145: Injector 4; Signal Missing. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Intermittent fault
• EFI-145: Injector 4; Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Permanent fault
• EFI-145: Injector 4; Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Intermittent fault
• EFI-145: Injector 4; Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Permanent fault
• EFI-145: Injector 4; Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Intermittent fault
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Faulty Signal. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
    • EFI-153: Rear heated oxygen sensor (HO2S), signal
  • Faulty signal. Intermittent fault
    • Notes
    • Checking cables
    • Information
      • Fault-tracing information
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Faulty Signal. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
  • Faulty signal. Permanent fault
    • Notes
    • Checking the rear heated oxygen sensor (HO2S)
    • Checking for a short-circuit
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Signal Missing. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
  • Signal missing. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
  • Signal missing. Permanent fault
    • Notes
    • Checking signal cable (+), rear heated oxygen sensor (HO2S)
    • Checking control module connector
    • Fault-tracing information
    • Checking for an open-circuit
    • Checking signal cable (-), rear heated oxygen sensor (HO2S)
    • Checking rear heated oxygen sensor (HO2S) signal
    • Checking for damage
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
  • Signal too high. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
  • Signal too high. Permanent fault
    • Notes
    • Connector A
      • Notes
      • Connecting up the Test box to Motronic 4.3
      • Connection of break-out box to connector A (black)
      • Checking ground terminals
      • Checking for open-circuit, contact resistance and oxidation
      • Verification
      • Checking the signal cable (-), front heated oxygen sensor (HO2S)
      • Checking front heated oxygen sensor (HO2S)
      • Replacing component
      • Checking the rear heated oxygen sensor (HO2S)
      • Checking the signal cable (+), front heated oxygen sensor (HO2S)
      • Checking for a short-circuit
      • Checking signal cable (+), rear heated oxygen sensor (HO2S)
    • Information
      • Fault-tracing information
    • Verification
      • Verification
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
  • Signal too low. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-153: Rear, Heated Oxygen Sensor (Ho2S). Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-153
  • Signal too low. Permanent fault
    • Notes
    • Connector A
      • Notes
      • Connecting up the Test box to Motronic 4.3
      • Connection of break-out box to connector A (black)
      • Checking ground terminals
      • Checking for open-circuit, contact resistance and oxidation
      • Verification
      • Checking the signal cable (-), front heated oxygen sensor (HO2S)
      • Checking front heated oxygen sensor (HO2S)
      • Replacing component
      • Checking the rear heated oxygen sensor (HO2S)
      • Checking for a short-circuit
      • Checking the signal cable (+), front heated oxygen sensor (HO2S)
      • Checking signal cable (+), rear heated oxygen sensor (HO2S)
    • Information
      • Fault-tracing information
    • Verification
      • Verification
• EFI-155: Injector 5; Signal Missing. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Intermittent fault
• EFI-155: Injector 5; Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal missing. Permanent fault
• EFI-155: Injector 5; Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Intermittent fault
• EFI-155: Injector 5; Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too high. Permanent fault
• EFI-155: Injector 5; Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Intermittent fault
• EFI-155: Injector 5; Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-115, EFI-125, EFI-135, EFI-145, EFI-155
  • Signal too low. Permanent fault
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Faulty Signal. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
    • EFI-212: Front heated oxygen sensor (HO2S), signal
  • Faulty signal. Intermittent fault
    • Notes
    • Checking cables
    • Information
      • Fault-tracing information
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Faulty Signal. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
  • Faulty signal. Permanent fault
    • Notes
    • Checking front heated oxygen sensor (HO2S)
    • Checking for a short-circuit
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Signal Missing. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
  • Signal missing. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
  • Signal missing. Permanent fault
    • Notes
    • Checking the signal cable (+), front heated oxygen sensor (HO2S)
    • Checking control module connector
    • Fault-tracing information
    • Checking for an open-circuit
    • Checking front heated oxygen sensor (HO2S) signal
    • Checking for damage
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
  • Signal too high. Intermittent fault
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
  • Signal too high. Permanent fault
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
  • Signal too low. Intermittent fault
• EFI-212: Front Heated Oxygen Sensor (Ho2S). Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-212
  • Signal too low. Permanent fault
• EFI-214: Engine Speed (Rpm) Sensor. Signal Sporadic: (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-214
    • EFI-214: Engine speed (RPM) sensor, signal sporadic
  • Signal sporadic. Faulty signal
    • Notes
    • Checking cables and terminals
    • Checking for damage
    • Fault-tracing information
    • Replacing component
    • Information
      • Fault-tracing information
• EFI-223: Idle Air Control (IAC) Valve Opening. Signal Missing. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-223, EFI-245
    • EFI-223: Idle air control (IAC) valve opening, signal EFI-245 Idle air control (IAC) valve closing, signal
  • Signal missing. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-223: Idle Air Control (IAC) Valve Opening. Signal Missing. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-223, EFI-245
  • Signal missing. Permanent fault
    • Notes
    • Checking signal cable resistance to ground
    • Checking control module connector
    • Fault-tracing information
    • Checking for an open-circuit
    • Checking idle air control (IAC) valve
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-223: Idle Air Control (IAC) Valve Opening. Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-223, EFI-245
  • Signal too high. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-223: Idle Air Control (IAC) Valve Opening. Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-223, EFI-245
  • Signal too high. Permanent fault
    • Notes
    • Checking the signal cable
    • Checking for a short-circuit
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-223: Idle Air Control (IAC) Valve Opening. Signal Too Low: Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-223, EFI-245
  • Signal too low. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-223: Idle Air Control (IAC) Valve Opening. Signal Too Low: Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-223, EFI-245
  • Signal too low. Permanent fault
    • Notes
    • Checking power cable
    • Checking for an open-circuit
    • Checking signal wiring resistance
    • Checking for a short-circuit
    • Checking idle air control (IAC) valve
    • Fault-tracing information
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-225: Air Conditioning (A/C) Pressure Sensor. Faulty Signal. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-225
  • Faulty signal. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-225: Air Conditioning (A/C) Pressure Sensor. Faulty Signal. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-225
  • Faulty signal. Permanent fault
    • Notes
    • Checking the air conditioning (A/C) system
    • Replacing component
    • Fault-tracing information
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-225: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-225
  • Signal too high. Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-225: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-225
  • Signal too high. Permanent fault
    • Notes
    • Checking ground lead
    • Checking control module connector
    • Checking for an open-circuit
    • Checking the signal cable
    • Checking for a short-circuit
    • Checking signal cable resistance
    • Checking the air conditioning (A/C) pressure sensor
    • Checking for contact resistance and oxidation
    • Replacing component
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-225: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Intermittent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-225
  • Signal too low: Intermittent fault
    • Notes
    • Checking cables and terminals
    • Information
      • Fault-tracing information
• EFI-225: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Permanent Fault (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-225
  • Signal too low: Permanent fault
    • Notes
    • Checking power cable
    • Checking for a short-circuit
    • Checking signal cable resistance
    • Checking the air conditioning (A/C) pressure sensor
    • Checking for contact resistance and oxidation
    • Replacing component
    • Checking power cable resistance to ground
    • Checking accelerometer
    • Checking atmospheric pressure sensor
    • Checking fuel tank pressure sensor
    • Checking control module connector
    • Fault-tracing information
    • Checking for an open-circuit
    • Check
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-231: Long-Term Fuel Trim, Part Load. Lower Limit (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-231, EFI-232
    • EFI-231: Long-term fuel trim, part load EFI-232 Long-term fuel trim, idling speed
  • Lower limit:
    • Notes
    • Checking mass air flow (MAF) sensor
    • Replacing component
    • Checking canister purge (CP) valve
    • Checking engine oil level
    • Fault-tracing information
    • Checking engine oil
    • Checking for air leakage in the exhaust system
    • Checking fuel and residual pressures
    • Connecting the breakout box
      • Connecting breakout box to connector A (black)
      • Checking ground terminals
      • Checking for an open-circuit
      • Connecting breakout box to connector B (gray)
      • Checking ground terminal #B28
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-231: Long-Term Fuel Trim, Part Load. Upper Limit (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-231, EFI-232
  • Upper Limit
    • Notes
    • Checking mass air flow (MAF) sensor
    • Replacing component
    • Checking for air leakage in the intake system
    • Checking for air leakage in the exhaust system
    • Checking fuel and residual pressures
    • Checking pulsation damper
    • Connecting the breakout box
      • Connecting breakout box to connector B (gray)
      • Checking ground terminal #B28
      • Checking for an open-circuit
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• EFI-232: Long-Term Fuel Trim, Idling Speed. Lower Limit (B5234T3; B5254T; 1998)
  • Lower limit:
• EFI-232: Long-Term Fuel Trim, Idling Speed. Upper Limit (B5234T3; B5254T; 1998)
  • Upper Limit
• EFI-233: Adaptive Idle Air Trim. Lower Limit: (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-233
    • EFI-233: Adaptive idle air trim
  • Lower limit:
    • Notes
    • Checking throttle body (TB)
    • Replacing component
    • Checking link rod
    • Checking component
    • Checking for air leakage
    • Fault-tracing information
    • Checking idle air control (IAC) valve
    • Checking the idle air control (IAC) valve connector
    • Checking idle air control (IAC) valve resistance
    • Checking throttle
    • Verification
      • Verification
      • Verification, continued
    • Information
      • Fault-tracing information
• EFI-233: Adaptive Idle Air Trim. Upper Limit (B5234T3; B5254T; 1998)
  • Diagnostic trouble code (DTC) information EFI-233
  • Upper limit:
    • Notes
    • Checking throttle body (TB)
    • Replacing Throttle Body (TB)
    • Checking the air cleaner (ACL) and air intake
    • Fault-tracing information
    • Checking idle air control (IAC) valve
    • Replacing Idle Air Control (IAC) Valve
    • Checking the idle air control (IAC) valve control slide
    • Checking for contact resistance and oxidation
    • Verification
      • Verification
      • Verification, continued
    • Information
      • Fault-tracing information