P2188 AUDI – System Too Rich At Idle Bank 1

 

P2188: DIY Repairing Video Tutorial

https://youtu.be/3IOi1uaOk0A

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

 

P2188 AUDI Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P2188 AUDI Possible Causes

  Leaking fuel injector or pressure regulator,High fuel pressure condition,Faulty Oxygen (O2) Sensor,Faulty Mass Air Flow (MAF) sensor  

P2188 AUDI Description

  The engine control module (ECM) controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy, and emission control. Fuel delivery is controlled differently during Open Loop and Closed Loop. During Open Loop, the ECM determines fuel delivery based on sensor signals without heated oxygen sensor (HO2S) input. During Closed Loop, the ECM adds HO2S inputs to calculate the short and long term fuel trim (FT) adjustments. If the HO2S indicates a lean condition, the fuel trim values will be above 0 percent. If the HO2S indicates a rich condition, the FT values will be below 0 percent. The short term FT values change rapidly in response to the HO2S voltage signals. The long term FT makes coarse adjustments in order to maintain an air/fuel ratio of 14.7:1.