Except California Emission Regulation Applicable ATX Model
DTC P2196 DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P2196 |
Front HO2S signal stuck rich |
| DETECTION CONDITION |
- The PCM monitors the front HO2S output current when the following conditions are met. If the average output current is less than 0.8 A
for 25 s
, the PCM determines that the front HO2S signal remains rich.
MONITORING CONDITION
- ECT: more than 70°C {158°F}
- Engine speed: 1, 000-3, 200 RPM
- Charging efficiency: 20-62.5 %
- Target A/F feedback system status: feedback control
- Output voltage from the middle HO2S: less than 0.8 V
Diagnostic support note
- This is an 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 |
- Front HO2S malfunction
- Fuel injector malfunction
- Excessive fuel pressure
- Restriction in intake-air system
- MAF sensor malfunction
- ECT sensor malfunction
- PCM malfunction
|