DTC P0038 [L3]: Notes
DTC P0038 (L3) DETECTION CONDITION & POSSIBLE CAUSES
| DTC P0038 |
HO2S heater circuit high input |
| DETECTION CONDITION |
- The PCM monitors the HO2S heater output current at PCM terminal 2B. If the PCM turns the HO2S heater to ON but the HO2S heater circuit current is above 5.4 A
for 2 s
, the PCM determines that the HO2S heater circuit has malfunction.
Diagnostic support note
- This is a continuous monitor (HO2S heater).
- 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.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- HO2S connector or terminal malfunction
- HO2S heater malfunction
- PCM connector or terminal malfunction
- Short to power supply in wiring harness between HO2S terminal D and PCM terminal 2B
- Short circuit in HO2S or PCM
- PCM malfunction
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