Diagnostic Procedure

DTC P0135 - Heated Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

DIAGNOSTIC PROCEDURE





1. Check voltage of terminals HTR, HTS, HTL.
- If not OK proceed to step 2.
- If OK check and replace Engine Control Module.
2. Check resistance of heated Oxygen Sensor heater.
- If OK check and repair harness or connector between Main Relay and Heated Oxygen Sensor and Engine Control Module.
- If not OK replace Heated Oxygen Sensor.