LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 1993 >> Passat GL, 2.0 B, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Trouble Code Identification >> PASSAT GL (2.0L 4-Cylinder) Trouble Code I.D.
April 5, 2026: LEMON Manuals is launched! Read the announcement.

PASSAT GL (2.0L 4-Cylinder) Trouble Code I.D.

TROUBLE CODE IDENTIFICATION (PASSAT GL) (1)

DTC (2) (Blink) Code System/ Affected Circuit Possible Cause/Repair
65535 (1111) Electronic Control Module Replace Faulty ECM
00281 (1231) Trans. Speed Sensor Open Ckt (No Signal to ECM)
00514 (2112) Ign. Reference Open Ckt (No Signal to ECM)
00515 (2113) Hall Effect Sensor Open Ckt (No Signal to ECM)
00516 (2121) Idle Switch Open/Short To Ground Or B+ Volts
00517 (2123) Full Throttle Switch Short Ckt To Ground
00535 (2141) Knock Regulator (3) Repair Ckt Or
" " Replace Component(s)
00524 (2142) Knock Sensor (Cyls. 1 & 2) Open Ckt (No
" " Signal to ECM)
00540 (2144) Knock Sensor (Cyls. 3 & 4) Open Ckt (No
" " Signal to ECM)
00533 (2231) Idle Speed Regulation (4) Control Limit
" " Exceeded Or Not Reached
00520 (2232) Airflow Sensor Open/Short To Ground Or B+ Volts
00522 (2312) Coolant Temp. Sensor Open/Short To Ground Or B+
00537 (2341) O2 Sensor (5) Control Limit Exceeded/Not Reached
00525 (2342) O2 Sensor Open Ckt (No Signal to ECM)
00558 (----) Fuel Mix (Lean) (6) Control Limit Exceeded Or
" " Not Reached
00559 (----) Fuel Mix (Rich) Leaking Cold-Start Valve Or
" " Injectors Or Incorrect Idle Speed
00560 (2411) EGR Open/Short To Ground Or B+ Volts
01257 (4431) Idle Stabilizer Valve Open/Short To Ground
" " Or B+ Volts
00000 (4444) No Fault System Okay
(1) For testing information, see PIN VOLTAGE CHARTS - 4-CYL article.
(2) Blink code is 4-digit malfunction indicator CHECK ENGINE light code.
(3) Check fuel for low octane rating, improperly set ignition timing, or damaged knock sensor wiring shield. Also check for mechanical noise due to loose bolts or brackets.
(4) Check throttle body basic adjustment. Check intake system and fuel evaporative system for leaks. Check ignition timing. Also check for loss of signal from A/C compressor (idle-up function).
(5) Ensure CO level is within specification. Check cold-start valve and intake system for leaks. Check for stuck open fuel evaporative valves. Ensure ground connection between ECM and intake manifold is okay. Oxygen sensor circuit shorted to ground.
(6) Ensure idle speed is correctly adjusted. Check intake system for leaks. Ensure ground connection between ECM and intake manifold is okay.
scientia non olet · About LEMON Manuals