P0141

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P0141 - 1/2 O2 SENSOR HEATER FAILURE

WHEN MONITORED
During vehicle shutdown after the vehicle has been driven for greater than 10 miles with the throttle open for a minimum of 3 minutes. Battery voltage greater than 11.0 volts.

SET CONDITION
O2 sensor continues to rise, (instead of fall) after the diagnostics has turned the ASD relay back on. Two trip fault.

POSSIBLE CAUSES
- O2 sensor heater operation
- O2 heater element
- O2 sensor heater ground circuit open
- ASD relay output circuit open
- PCM