DTC P2274: Notes
DTC P2274 (LF, L3) 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).
- The 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.
|
| 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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