DTC Diagnosis Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK HEATED OXYGEN SENSOR 2 (HO2S2) POWER SUPPLY CIRCUIT
- Disconnect heated oxygen sensor 2 (HO2S2) harness connector.
- Turn ignition switch ON.
- Check the voltage between HO2S2 harness connector and ground.
DTC
HO2S2
Ground
Voltage
Bank
Connector
Terminal
P0037, P0038
1
F57
4
Ground
Battery voltage
P0057, P0058
2
F74
4
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- DETECT MALFUNCTIONING PART
Check the following.
- 20 A fuse (No. 53)
- Harness for open or short between heated oxygen sensor 2 and fuse
- Loose or poor connection for each connector and harness
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between HO2S2 harness connector and ECM harness connector.
DTC
HO2S2
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P0037, P0038
1
F57
3
F79
118
Existed
P0057, P0058
2
F74
3
119
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 4.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK HO2S2 HEATER
Refer to Component Inspection (HO2 Sensor 2 Heater) .
Is the inspection result normal?
YES
Repair or replace error-detected parts.
NO
GO TO 5.
- REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning heated oxygen sensor 2. Refer to Removal and Installation .
CAUTION:- Discard any heated oxygen 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 oxygen 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