DTC P2270: Notes
DTC P2270 (LF, L3) DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P2270 |
Middle HO2S signal stuck lean |
| DETECTION CONDITION |
- The PCM monitors the middle HO2S input voltage when the following conditions are met. If the subtracted input voltage from the target voltage (calculated by PCM) is 0.4 V or less for 30 s
, the PCM determines that the front HO2S signal remains lean.
MONITORING CONDITION
- ECT: more than 70°C {158°F}
- Engine speed: more than 1, 500 rpm
- MAF amount: more than 10 g/s {1.32 lb/min}
- Short term fuel trim: -20-20%
- Long term fuel trim: -15-15%
- Fuel injection system status: feedback control
Diagnostic support note
- This is a intermittent monitor (HO2S).
- The MIL illuminates if PCM detects the above malfunctioning 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 PCM detects the above malfunction conditions during first drive cycle.
- FREEZE FRAME DATA is available.
- DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Leakage exhaust gas
- Middle HO2S malfunction
- Leakage fuel
- Fuel injector malfunction
- Air suction at intake-air system
- MAF sensor malfunction
- ECT sensor malfunction
- PCM malfunction
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