Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnosis Procedure
- CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".
Is the inspection result normal?
YES: GO TO 2.
NO: Repair or replace ground connection.
- CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
- Disconnect A/F sensor 1 harness connector.
- Turn ignition switch ON.
- Check the voltage between A/F sensor 1 harness connector and ground.VOLTAGE SPECIFICATIONS
DTC A/F sensor 1 Ground Voltage Bank Connector Terminal P0132 1 F3 4 Ground Battery voltage P0152 2 F20 4
Is the inspection result normal?
YES: GO TO 4.
NO: GO TO 3.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E3, F1
- IPDM E/R harness connector E7
- 15A fuse (No. 46)
- Harness for open or short between A/F sensor 1 and fuse
Repair or replace harness or connectors.
- CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between A/F sensor 1 harness connector and ECM harness connector.CONTINUITY SPECIFICATIONS
DTC A/F sensor 1 ECM Continuity Bank Connector Terminal Connector Terminal P0132 1 F3 1 F102 57 Existed 2 61 P0152 2 F20 1 65 2 66 - Check the continuity between A/F sensor 1 harness connector or ECM harness connector and ground.CONTINUITY SPECIFICATIONS
DTC A/F sensor 1 ECM Ground Continuity Bank Connector Terminal Connector Terminal P0132 1 F3 1 F102 57 Ground Not existed 2 61 P0152 2 F20 1 65 2 66 - Also check harness for short to power.
Is the inspection result normal?
YES: GO TO 5.
NO: Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK INTERMITTENT INCIDENT
Perform "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: GO TO 6.
NO: Repair or replace malfunctioning part.
- REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:- Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
- Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant (commercial service tool).
INSPECTION END
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.