DTC P2274: Notes
DTC P2274 DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P2274 |
Rear HO2S signal stuck lean |
| DETECTION CONDITION |
- The PCM monitors the rear HO2S input voltage when the following conditions are met. If the subtracted input voltage from the target voltage (calculated by PCM) is below 0.17 V
even after recovery from fuel cut, the PCM determines that the front HO2S signal remains lean.
Diagnostic support note
- This is an intermittent monitor (HO2S).
- MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in PCM.
- PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
- FREEZE FRAME DATA is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Leakage exhaust gas
- Rear HO2S malfunction
- Fuel injector malfunction
- Leakage fuel
- MAF sensor malfunction
- ECT sensor malfunction
- Air suction at intake-air system
- PCM malfunction
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