P0136

Test 1 - 3:

Test 4 - 6:

SYMPTOM
P0136-O2 SENSOR 1/2 HEATER CIRCUIT MALFUNCTION

WHEN MONITORED
Ignition ON, with battery voltage greater than 10.4 volts.

SET CONDITION
The state of the PCM relay control circuit, between the PCM and relay coil, does not match the desired state.

POSSIBLE CAUSES
- Good trip equal to zero
- O2 sensor heater relay
- (A141) fused ASD relay output circuit
- (K127) O2 heater relay control circuit open
- (K127) O2 heater relay control circuit shorted to ground
- PCM