P0135

Test 1 - Test 4:

Test 5:

SYMPTOM
P0135-O2 SENSOR 1/1 HEATER PERFORMANCE

WHEN MONITORED
Engine running and heater duty cycle greater than 0%. ASD Relay is energized. Battery voltage greater than 10.4 volts.

SET CONDITION
No sensor output is received when the PCM powers up the sensor heater. O2 heater is out of control for 128 seconds after it has reached 300 deg C. Two trip fault

POSSIBLE CAUSES
- O2 sensor heater operation
- O2 heater element
- O2 heater control circuit open
- O2 heater ground circuit open
- PCM