DTC P2196 [L3]: Notes
DTC P2196 (L3) DETECTION CONDITION & POSSIBLE CAUSES
| DTC P2196 |
A/F sensor signal stuck rich |
| DETECTION CONDITION |
- The PCM monitors the A/F sensor equivalence ratio (lambda) when the following conditions are met. If equivalence ratio is below 0.85 for 25s,
the PCM determines that the A/F sensor signal remains rich.
MONITORING CONDITION
- Fuel injection control system status: feedback control
- HO2S feedback control is active
- HO2S fuel trim is above 2.97%
or 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 (A/F sensor, 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 |
- Erratic signal to PCM
- ECT sensor
- MAF sensor
- TP sensor
- Related connector or terminal malfunction
- Related wiring harness malfunction
- Air suction or restriction in intake air system
- MAF sensor malfunction
- A/F sensor malfunction
- Excessive fuel pressure
- Fuel injector malfunction
- PCM malfunction
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