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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. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
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. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
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.
(See OBD DRIVE MODE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
• 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" (See AFTER REPAIR PROCEDURE [AJ].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Troubleshooting completed.