DTC P2270: Notes
DTC P2270 DETECTION & CONDITION POSSIBLE CAUSES
| DTC P2270 |
Rear HO2S signal stuck lean |
| DETECTION CONDITION |
- The PCM monitors the input voltage from the rear HO2S when the following conditions are met. If the input voltage is less than 0.4 V
for 40 s
, the PCM determines that the rear 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: -50-50%
- Target A/F feedback system status: feedback control
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 |
- Front HO2S malfunction
- Rear HO2S malfunction
- Front HO2S heater malfunction
- Rear HO2S heater malfunction
- Fuel pump control malfunction
- Fuel pressure malfunction
- Fuel injector malfunction
- Leakage exhaust gas
- Purge solenoid valve malfunction
- Purge solenoid valve hoses improper connection
- AIR system malfunction
- Insufficient compression
- Engine oil malfunction
- Increased oil pressure
- Metering oil pump malfunction
- Metering oil pump control malfunction
- Engine malfunction
- PCM malfunction
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