October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Oxygen Sensor Operation: Sub-Sensor(s)
- Clear trouble codes. See appropriate TESTS W/CODES
article. Warm engine to normal operating temperature.
- With transmission in Drive, cruise at 50-55 MPH for 10 minutes or more. Stop vehicle and idle engine for 2 minutes or less. Accelerate vehicle to 50 MPH with throttle fully open. Turn ignition off. Retrieve trouble codes. If no codes are set, sub-sensor circuit is functioning properly. If any codes are set, repair as necessary. See appropriate TESTS W/CODES
article.