DTC P2097:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSES

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 is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	HO2S malfunction Leakage exhaust gas 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 Leakage exhaust gas Excessive fuel line pressure Fuel pump unit malfunction Purge solenoid valve malfunction Ignition system malfunction Ignition coil related wiring harness malfunction Fuel injector malfunction Insufficient engine compression 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 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 is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

HO2S malfunction
- Leakage exhaust gas
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
- Leakage exhaust gas
Excessive fuel line pressure
Fuel pump unit malfunction
Purge solenoid valve malfunction
Ignition system malfunction
- Ignition coil related wiring harness malfunction
Fuel injector malfunction
Insufficient engine compression
PCM malfunction