P0135

Tests 1 - 2:

Tests 3 - 7:

Test 8:

SYMPTOM
P0135-1/1 O(2) SENSOR HEATER FAILURE (4 CYLINDER)

WHEN MONITORED
During vehicle shutdown after vehicle had been driven greater than 10 miles with throttle open for a minimum of 3 minutes. Battery voltage greater than 11.0 volts.

SET CONDITION
O(2) sensor voltage continues to rise (instead of fall) after the diagnostics has turned the ASD relay back ON. Two trip fault.

POSSIBLE CAUSES
- O(2) Heater Element
- O(2) Sensor Heater Control Circuit Open
- O(2) Sensor Heater Control Circuit Shorted To Ground
- ASD Relay Output Circuit Open
- Intermittent Condition
- PCM