P0135

Tests 1 - 3:

Tests 4 - 7:

SYMPTOM
P0135 - O2 SENSOR HEATER FAILURE

WHEN MONITORED
With the ignition key OFF; after the engine cools down.

SET CONDITION
No sensor output signal is received when the PCM powers up the sensor heater.

POSSIBLE CAUSES
- 1/1 O2 sensor connector damaged
- 1/1 O2 sensor ground circuit open
- ASD relay output circuit open
- 1/1 O2 sensor failure
- 1/1 O2 sensor heater element failure
- 1/1 O2 sensor heater failure does not reoccur