Monitor DTC Status

P0134 O2 Sensor Circuit No Activity Detected (Sensor 1)

Scantool Diagnostics - Monitor Scantool Data

Monitor Scantool Data

1. Connect scantool to Data Link Connector (DLC).
2. Warm up the engine to normal operating temperature.
3. Monitor "HO2S (B1/S1)" parameter on scantool.




4. Is the "HO2S (B1S1)" parameter 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, bending, 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

CAUTION:
This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first.