DTC P2187 [L3]: Notes
DTC P2187 (L3) DETECTION CONDITION & POSSIBLE CAUSES
| DTC P2187 |
Fuel system too lean at idle |
| DETECTION CONDITION |
- PCM monitors short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during closed loop fuel control at idle. If the LONGFT and the sum total of these fuel trims or SHRTFT exceed pre programmed criteria. PCM determines that fuel system is too lean at idle.
Diagnostic support note
- This is a continuous monitor. (Fuel system)
- 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
- Leakage exhaust system
- A/F sensor deterioration
- A/F sensor heater malfunction
- MAF sensor malfunction
- Air suction in intake air system
- Purge solenoid valve malfunction
- Purge solenoid hoses improper connection
- Pressure regulator (built-in fuel injection pump) malfunction
- Fuel pump malfunction
- Fuel filter clogged or restricted
- Fuel leakage on fuel line from fuel delivery pipe and fuel pump
- Ignition system malfunction
- Insufficient engine compression
- Variable valve timing control system improper operation
- Fuel injector improper operation
- Misfire
- PCM malfunction
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