LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 2010 >> Kizashi SLS, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0037/P0038 >> DTC Troubleshooting
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Troubleshooting

DIAGNOSTIC PROCEDURES CHART

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2  HO2S heater power supply circuit check 
  1. Confirm that ignition mode of keyless push start system is "OFF".
  2. Disconnect connector from HO2S.
  3. Check for proper terminal connection to HO2S.
  4. If connections are OK, push engine switch to change ignition mode to "ON".
  5. Check that voltage between "A1" circuit and ground: battery voltage.

Is it in good condition? 		 Go to Step 3. Repair or replace defective parts or wire harness.
3  HO2S heater drive circuit check 
  1. Push engine switch to change ignition mode to "OFF".
  2. Disconnect "C01" and "E01" connectors.
  3. Check for proper terminal connection to "C01" and "E01" connectors.
  4. Check the following points.
    • Resistance of "A2" circuit: less than 1 Ω
    • Resistance between "A2" circuit and ground: infinity
    • Resistance between "A2" circuit terminal and each terminal at HO2S connector: infinity
    • Voltage of "A2" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON")

Are they in good condition? 		 Go to Step 4. Repair or replace defective wire harness.
4  HO2S check 
  1. Check HO2S heater, see HO2S ON-VEHICLE INSPECTION .

Is it in good condition? 		 Replace ECM and recheck DTC, see ECM REMOVAL AND INSTALLATION . Replace HO2S, see A/F SENSOR AND HO2S REMOVAL AND INSTALLATION .
scientia non olet · About LEMON Manuals