DTC P0141 HEATED OXYGEN SENSOR 2 HEATER (REAR) - Diagnostic Procedure
EF & EC-7152flowchartDiagnostic Procedure
DTC P0141 Heated Oxygen Sensor 2 Heater (Rear) Diagnostic Procedure
1
1. CHECK POWER SUPPLY
1. Turn ignition switch "OFF".
2. Disconnect heated oxygen sensor 2 (rear) harness connector.
3. Turn ignition switch "ON".
4. Check voltage between terminal 4 and ground.
NG
2. DETECT MALFUNCTIONING PART
2. DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E67
- Harness for open or short between heated oxygen sensor 2 (rear) and ECM relay
Repair harness or connectors.
OK
2
3. CHECK GROUND CIRCUIT
1. Turn ignition switch "OFF".
2. Disconnect ECM harness connector.
3. Check harness continuity between heated oxygen sensor 2 (rear) harness connector terminal 1 and ECM terminal 30. Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
NG
GO TO 4.
OK
3
GO TO 5.