P0138

Test 1:

Tests 2 - 6:

Test 7:

SYMPTOM
P0138-1/2 O2 SENSOR SHORTED TO VOLTAGE

TEST NOTE
This symptom is diagnosed using the test P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE.

WHEN MONITORED
The engine running. Battery voltage greater than 10 volts. Engine running for more than 2 minutes. Coolant temperature above 80 °C (176 °F).

SET CONDITION
The Oxygen Sensor voltage is above 1.21 volts.

POSSIBLE CAUSES
- Intermittent condition
- O2 sensor operation
- O2 sensor signal shorted to voltage
- O2 sensor signal open
- O2 sensor ground circuit open
- PCM