DTC P0136 HEATED OXYGEN SENSOR 2 (REAR) (CIRCUIT); Diagnostic Procedure
EF & EC-7132prose procedureRear sensor signal pin is ECM-39 to connector-2 (vs front sensor ECM-12 to connector-1).
CG10, CGA3
Diagnostic Procedure
Step 1 — INSPECTION START
- 1Turn ignition switch "OFF".
- 2Loosen and retighten engine ground screws. (See NEF147A)
- 3Disconnect heated oxygen sensor 2 (rear) harness connector. (See NEF154A)
- 4→ GO TO 2.
Step 2 — CHECK INPUT SIGNAL CIRCUIT
- 1Disconnect ECM harness connector.
- 2Check harness continuity between ECM terminal 39 and heated oxygen sensor 2 (rear) harness connector terminal 2. Refer to wiring diagram. Continuity should exist.
- 3Check harness continuity between ECM terminal 39 (or terminal 2) and ground. Continuity should not exist.
- 4Also check harness for short to power.
- 5OK or NG: - OK → GO TO 3. - NG → Repair open circuit or short to ground or short to power in harness or connectors.
Step 3 — CHECK HEATED OXYGEN SENSOR 2 (REAR)
- 1Refer to "Component Inspection", EC-7133.
- 2OK or NG: - OK → GO TO 4. - NG → Replace heated oxygen sensor 2 (rear).
Step 4 — CHECK INTERMITTENT INCIDENT
- 1Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT", EC-7070.
- 2→ INSPECTION END.
See also
EC-7133 · EC-7070