Mechanics

ENGINE LIGHT ON

2007 Kia Optima • 4 cylinder 2WD Automatic • 51,000 miles

I have kia optima 2007 engine light on and scanner code is P2096
Avatar
Hasan555
March 6, 2011.




DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN (BANK 1)

GENERAL DESCRIPTION
In order to provide the best possible combination of driveability, fuel economy and emission control, the ECM uses a closed loop air/fuel metering system. It monitors the HO2S signal voltage and adjusts fuel delivery based in closed loop fuel control. Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around 0%. The ECM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that are above 0%. The ECM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a lean or rich condition.

DTC DESCRIPTION
If the lambda controller reaches the maximum or minimum threshold, then feedback control is no longer possible and emissions will be increased. The ECM sets DTC P2096 if no proportional post catalyst fuel trim adaptation occurs for a defined time after the lambda controller has reached its maximum threshold.

Possible causes : 1. Air leak in exhaust system.
2. Faulty HO2S
3. Faulty two way catalytic converter.

DTC DETECTING CONDITION
DTC CHART

ItemDetecting ConditionPossible Cause
DTC StrategyMonitoring deviation of
down HO2S feedback
control

Air leakage in exhaust
System

HO2S

TWC

Enable Conditions
Lambda control active

No relevant failure

Dynamic fuel trim is
active

Canister purge valve
not opening or closing

Threshold ValueAdaptation value > 630
msec.

Diagnostic Time60 sec.

MIL On Condition2 Driving Cycles

KHLow2008
Mar 6, 2011.


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