DTC P0138, P0158 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200100219

European (L.H.D.) Specs.

DTC P0138

DTC P0158

HO2S (Rear, RH) circuit high input

HO2S (Rear, LH) circuit high input

DETECTION CONDITION

• PCM monitors input voltage from HO2S (Rear) when monitoring conditions are met. If input voltage from sensor is above 0.45 V for 6 s during deceleration fuel cut, PCM determines that the circuit input is high.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles.
• PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• HO2S (Rear) malfunction
• Short to power circuit in wiring between HO2S (Rear) terminal and PCM terminal
- For HO2S (Rear, RH): A and 35
- For HO2S (Rear, LH): A and 61

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING OR STORED DTCS
• Turn the ignition switch off, then to the ON position (Engine off).
• Verify pending code or stored DTCs using the WDS or equivalent.
• Is other DTC present?
Yes
Go to the applicable DTC inspection.
No
Go to the next step.
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P0138 (HO2S (Rear, RH)) or P0158 (HO2S (Rear, LH)) on FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
5
INSPECT HO2S (Rear) SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY CIRCUIT
• Turn the ignition switch off.
• Disconnect HO2S (Rear, RH) for P0138 or HO2S (Rear, LH) for P0158 connector.
• Turn the ignition switch to the ON position (Engine off).
• Measure voltage between HO2S (Rear, RH) terminal A/HO2S (Rear, LH) terminal A (wiring harness-side) and body ground.
• Is there voltage?
Yes
Replace short to power supply then go to Step 7.
No
Go to the next step.
6
VERIFY CURRENT INPUT SIGNAL STATUS
• Start engine.
• Access O2S12 for P0138 or O2S22 for P0158 PID using WDS or equivalent.
• Verify PID while racing engine at least 10 times (in PARK or NEUTRAL).
• Does PID reading stay above 0.45 V?
Yes
Repair or replace the sensor, then go to the next step.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC P0138 or P0158 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch to the ON position (Engine off).
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Run PCM adaptive memory procedure drive mode and HO2S heater, HO2S, and TWC repair verification drive mode.
• Is the PENDING CODE of same DTC present.
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure"
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.