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P0172 Diagnostic Trouble Code Discussion for September 2011

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2003 GMC Envoy XL SLT 4.2L Poor Fuel Economy, MIL Lamp on VIN: 1GKET16S73
P0172: Fuel Trim System Rich. ... this one! This Envoy came in a few months ago complaining bout fuel milage. We did a complete tune up: plugs, boots, fuel filter, and cleaned the throttle plate. We also told him to run some Sea Foam in the fuel to help clean the injectors. He came back bo...
September 20, 2011