Diagnostic Procedure

DIAGNOSTIC PROCEDURE





1. Check for open and short in harness and connector between Engine Control Module and Heated Oxygen Sensor.
- If OK proceed to step 2.
- If not OK repair or replace harness or connector.
2. Check Heated Oxygen Sensor data.
- If not OK proceed to step 3.
- If OK check fuel trim system.
3. Check output voltage of Heated Oxygen Sensor.
- If OK perform confirmation driving pattern.
- If not OK replace Heated Oxygen Sensor.