P2191 KIA – System Too Lean At Higher Load Bank 1

 

P2191: DIY Repairing Video Tutorial

https://youtu.be/ED_DB6uZBhY

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P2191 KIA Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P2191 KIA Possible Causes

  Leaking fuel injector or pressure regulator,Faulty Mass Air Flow (MAF) sensor,High fuel pressure condition,Faulty front HO2S,Leak in exhaust system,Faulty PCV system  

P2191 KIA Description

  In order to provide the best possible combination of driveability, fuel economy and emission control, the Powertrain Control Module (PCM) uses a closed loop air/fuel metering system. The PCM 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 PCM 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 PCM 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.