P0068 GMC – MAP/MAF – Throttle Position Correlation

 

P0068: DIY Repairing Video Tutorial

https://youtu.be/0XAPoV9XQsU

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

 

P0068 GMC Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Lack/Loss of power,Engine rough idle  

P0068 GMC Possible Causes

  Air leak between the MAF sensor and throttle body,Dirty Throttle body or Mass Air Flow (MAF) sensor,Throttle Position (TP) sensor not seated properly,Faulty Throttle Position (TP) sensor,Faulty Mass Air Flow (MAF) sensor  

P0068 GMC Description

  The Powertrain Control Module (PCM) uses the Throttle Position (TP), Barometric Pressure (BARO), Intake Air Temperature (IAT), and engine RPM in order to calculate the predicted mass airflow rate. The PCM compares the predicted Mass Air Flow (MAF) value to the actual mass airflow value and the speed density calculation in order to verify the proper throttle operation.