DTC P2097:00: Notes

DTC P2097:00	Target A/F feedback system too rich
DETECTION CONDITION	The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is less than specification, the PCM determines that the target A/F feedback system is too rich. 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 first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Exhaust gas leakage (between TWC and HO2S) HO2S looseness HO2S malfunction IAT sensor malfunction Erratic signal to PCM APP sensor signal malfunction ECT sensor No.1 signal malfunction MAF sensor signal malfunction TP sensor signal malfunction VSS signal malfunction Exhaust gas leakage (between exhaust manifold and A/F sensor) A/F sensor looseness A/F sensor malfunction Excessive fuel line pressure Pressure regulator malfunction (built-into fuel pump unit) Improper operation of purge control system Purge solenoid valve malfunction Ignition system malfunction Ignition coil malfunction Ignition coil related wiring harness malfunction Spark plug malfunction Improper operation of fuel injector Fuel injector related wiring harness malfunction Fuel injector malfunction Insufficient engine compression ECT sensor No.1 malfunction PCM malfunction

DTC P2097:00

Target A/F feedback system too rich

DETECTION CONDITION

The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is less than specification, the PCM determines that the target A/F feedback system is too rich.
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 first drive cycle.
FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

Exhaust gas leakage (between TWC and HO2S)
HO2S looseness
HO2S malfunction
IAT sensor malfunction
Erratic signal to PCM
- APP sensor signal malfunction
- ECT sensor No.1 signal malfunction
- MAF sensor signal malfunction
- TP sensor signal malfunction
- VSS signal malfunction
Exhaust gas leakage (between exhaust manifold and A/F sensor)
A/F sensor looseness
A/F sensor malfunction
Excessive fuel line pressure
- Pressure regulator malfunction (built-into fuel pump unit)
Improper operation of purge control system
- Purge solenoid valve malfunction
Ignition system malfunction
- Ignition coil malfunction
- Ignition coil related wiring harness malfunction
- Spark plug malfunction
Improper operation of fuel injector
- Fuel injector related wiring harness malfunction
- Fuel injector malfunction
Insufficient engine compression
ECT sensor No.1 malfunction
PCM malfunction