P0141

Tests 1 - 3:

Tests 4 - 7:

SYMPTOM
P0141-1/2 O2 SENSOR HEATER FAILURE

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

SET CONDITION
O2 sensor voltage greater than 3 volts for 60 to 240 seconds.

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