Monitor DTC Status

P0037 HO2S Heater Circuit Low (Sensor2)

Scantool Diagnostics - Monitor Scantool Data

Monitor Scantool Data

1. Connect scantool to DLC (Data Link Cable).
2. Warm up the engine to normal operating condition.
3. Monitor "HO2S (B1S2)" parameter on scantool.




4. Is the "HO2S Heater (B1/S2)" data displayed correctly?
YES
1) Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
1) Go to "Terminal & Connector Inspection" procedure.