DTC P2270: Notes
DTC P2270 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)
- 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.
- DTC is stored in the PCM memory.
|
| POSSIBLE CAUSE |
- Leakage exhaust gas
- Middle HO2S malfunction
- Leakage - Fuel injector malfunction
- Air suction at intake-air system
- MAF sensor malfunction
- ECT sensor malfunction
- PCM malfunction
|