DTC P0138, P0158: Notes
DTC P0138, P0158 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES
DTC P0138
DTC P0158 |
HO2S (RR) circuit high input
HO2S (LR) circuit high input |
| DETECTION CONDITION |
- The PCM monitors input voltage from front HO2S (RR, LR). If the PCM detected HO2S (RR, LR) voltage above 1.2 V
for 0.8 s
, the PCM determines that the circuit input is high.
Diagnostic support note
- This is a continuous monitor (HO2S).
- MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
- PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA is available.
- DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- HO2S (RR, LR) malfunction
- Short to power supply in the wiring harness between the following terminals:
- For P0138: HO2S (RR) terminal A and PCM terminal 2AG
- For P0158: HO2S (LR) terminal A and PCM terminal 2AH
- HO2S (RR, LR) or PCM terminal is shorted
- PCM malfunction
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