Early Production (SBEC)

Test 1 - 4:

Test 5 - 6:

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
Engine running for 119 seconds. Battery voltage greater than 10 volts. Coolant temperature above 80° C (176° F).

SET CONDITION
The Oxygen Sensor voltage is above 1.29 volts for 30 seconds. Two trip fault.

POSSIBLE CAUSES
- O2 sensor below 1.2 volts
- O2 sensor operation
- O2 sensor signal shorted to voltage
- O2 sensor signal open
- O2 sensor ground circuit open
- PCM