DTC P2196: Notes
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 0.85 A
for 25 s
, the PCM determines that the front HO2S has a malfunction.
MONITORING CONDITION
- ECT: more than 70°C {158°F}
- Engine speed: 1, 00-3, 00 RPM
- Charging efficiency: 20-62.5%
- Output voltage from the rear HO2S: 0.8 V or less
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.
- DTCs are stored in the PCM memory.
|
| POSSIBLE CAUSE |
- Front HO2S malfunction
- Fuel injector malfunction
- Excessive fuel pressure
- Fuel pressure sensor malfunction
- Relief valve (built-in fuel delivery pipe) malfunction
- Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction
- High pressure fuel pump malfunction
- Restriction in intake-air system
- MAF sensor malfunction
- ECT sensor malfunction
- PCM malfunction
|