P0038

Test 1:

Test 2 - 5:

Test 6 - 7:

SYMPTOM LIST
P0038-O2 SENSOR 1/2 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
Desired state does not equal Actual state.

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