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 malfunctioning 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 conditions during first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	HO2S malfunction Exhaust gas leakage (between TWC and HO2S) IAT sensor malfunction Erratic signal to PCM ECT sensor signal malfunction MAF sensor signal malfunction TP sensor signal malfunction VSS signal malfunction A/F sensor malfunction Exhaust gas leakage (between exhaust manifold and A/F sensor) Excessive fuel line pressure Pressure regulator malfunction Fuel pump malfunction Fuel leakage on fuel line from fuel distributor to fuel pump Fuel filter restricted Fuel return hose restricted Purge solenoid valve malfunction Ignition system malfunction Ignition coil related wiring harness malfunction Fuel injector malfunction Insufficient engine compression ECT sensor malfunction PCM malfunction