DTC P2196 [L3]: Notes
DTC P2196 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES
| DTC P2196 |
Front HO2S signal stuck rich |
| DETECTION CONDITION |
- The PCM monitors the front HO2S equivalence ratio (lambda) when the following conditions are met. If equivalence ratio is below 0.85 for 25s, the PCM determines that the front HO2S signal remains rich.
MONITORING CONDITION
- Fuel injection control system status: feedback control
- Rear HO2S feedback control is active
- Rear HO2S fuel trim is above 2.97%
or rear HO2S voltage below 0.2V
- Engine speed is 1,000-3,200 rpm
- Absolute load: 20-62.5%
- Purge solenoid valve does not operate
Diagnostic support note
- This is an intermittent monitor (HO2S).
- 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.
- DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Front HO2S malfunction
- Fuel injector malfunction
- Excessive fuel pressure
- Restriction in intake air system
- MAF sensor malfunction
- ECT sensor malfunction
- PCM malfunction
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