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P2196 O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)

AutoHex Online Help: Hyundai i30(GDe) 2013
General Description

In order to provide the best possible combination of drivability, fuel economy and emission control, the ECM uses a closed loop air/fuel metering system. The ECM monitors the HO2S signal voltage and adjusts fuel delivery based it 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

ECM assumes Lambda sensor is out of control and shows P2196 when upstream O2 sensor displays rich condition in spite of continuous correcting by downstream O2 sensor.



DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

Check the revised air-fuel-ratio

Poor connection

S1

Blocking of intake system

Fuel leakage in injector

Improper fuel pressure

Enable Conditions

Engine speed 1120~3000rpm

Catalyst temp.(model) >662?

Threshold Value

Deviation value of air fuel ratio control < - 0.07

Diagnostic Time

-

MIL ON Condition

2 Driving Cycles