96 Pontiac Sunfire OBD2 Code P0172: Fuel Trim System Rich - Causes and Solutions

Model: 96 Pontiac Sunfire Fault Code: P0172 Posted: 2014-09-03 03:37

I'm having a fuel trim system rich issue on my 1996 Pontiac Sunfire, showing OBD2 diagnostic code P0172. I need help identifying the possible causes. This problem is preventing me from passing smog inspection, so a quick and accurate answer would be greatly appreciated. Can anyone explain what might be causing this? Thank you in advance for your assistance. Marnae