P0136

Tests 1 - 2:

Tests 3 - 6:

SYMPTOM
P0136-1/2 O2 SENSOR HEATER CIRCUIT MALFUNCTION

TEST NOTE
This symptom is diagnosed using the test P0130-1/1 O2 SENSOR 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
- Wiring harness intermittent
- Open circuit between relay and fuse
- Open circuit between relay and PCM
- Short to ground between relay and fuse
- Open fuse