DTC P2178, P2180: Notes
DTC P2178, P2180 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P2178 |
Fuel system too rich at off idle (Right bank) |
| DTC P2180 |
Fuel system too rich at off idle (Left bank) |
| DETECTION CONDITION |
- PCM monitors short term fuel trim (SHRTFT), long term fuel trim (LONGFT) during closed loop fuel control at off-idle. If the LONGFT and the sum total of these fuel trims exceed preprogrammed criteria, PCM determines that fuel system is too rich at off-idle.
Diagnostic support note
- This is a continuous monitor. (FUEL SYSTEM)
- 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.
- DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Misfire
- HO2S (RF, LF) deterioration
- HO2S heater (RF, LF) malfunction
- MAF sensor malfunction
- Pressure regulator (built-in fuel injection pump) malfunction
- Fuel pump malfunction
- EGR valve improper operation
- IMCC improper operation
- Purge solenoid valve improper operation
- Purge solenoid valve malfunction (stuck open)
- Purge solenoid hoses improper connection
- PCV valve malfunction
- PCM malfunction
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