P0052

Test 1 - Test 5:

Test 6 - Test 7:

SYMPTOM
P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH

TEST NOTE
This symptom is diagnosed using the test P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH.

WHEN MONITORED
Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is off.

SET CONDITION
O2 Heater element input is above the maximum acceptable voltage.

POSSIBLE CAUSES
- O2 sensor heater operation
- O2 heater element
- O2 heater ground circuit open
- O2 sensor
- O2 heater control shorted to voltage
- O2 heater control circuit open
- PCM