P0057

Test 1 - 5:

SYMPTOM
P0057-O2 SENSOR 2/2 HEATER CIRCUIT LOW

TEST NOTE
This symptom is diagnosed using the test P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW.

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

SET CONDITION
O2 Heater element input is below the minimum acceptable voltage.

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