DTC P2096 [LF]: Notes

DTC P2096 (LF) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P2096	Target A/F feedback system too lean
DETECTION CONDITION	The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is more than the specification, the PCM determines that the target A/F feedback system is too lean. MONITORING CONDITIONS HO2S voltage: above 0.1 V 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 (Mode 2/Mode 12) is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Leakage exhaust gas (between TWC and HO2S) HO2S malfunction IAT sensor malfunction Erratic signal to PCM ECT sensor signal malfunction MAF sensor signal malfunction TP sensor signal malfunction VSS signal malfunction Leakage exhaust gas (between exhaust manifold and A/F sensor) A/F sensor malfunction Air suction in intake air system MAF sensor malfunction Insufficient fuel line pressure Leakage fuel Fuel pump unit malfunction Fuel injector improper operation Fuel injector malfunction Fuel injector related wiring harness malfunction Improper operation of ignition system Spark plug malfunction Ignition coil malfunction Ignition coil related wiring harness malfunction Insufficient engine compression ECT sensor malfunction PCM malfunction

DTC P2096

Target A/F feedback system too lean

DETECTION CONDITION

The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is more than the specification, the PCM determines that the target A/F feedback system is too lean.

MONITORING CONDITIONS

HO2S voltage: above 0.1 V

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 (Mode 2/Mode 12) is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

Leakage exhaust gas (between TWC and HO2S)
HO2S malfunction
IAT sensor malfunction
Erratic signal to PCM
- ECT sensor signal malfunction
- MAF sensor signal malfunction
- TP sensor signal malfunction
- VSS signal malfunction
Leakage exhaust gas (between exhaust manifold and A/F sensor)
A/F sensor malfunction
Air suction in intake air system
MAF sensor malfunction
Insufficient fuel line pressure
- Leakage fuel
- Fuel pump unit malfunction
Fuel injector improper operation
- Fuel injector malfunction
- Fuel injector related wiring harness malfunction
Improper operation of ignition system
- Spark plug malfunction
- Ignition coil malfunction
- Ignition coil related wiring harness malfunction
Insufficient engine compression
ECT sensor malfunction
PCM malfunction