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P0172 Diagnostic Trouble Code Discussion for May 2014

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
1999 Chevrolet Tahoe LS 5.7L MIL Lamp on, Intermtnt hard start VIN: 1GNEK13RXX
P0172: Fuel Trim System Rich (Bank 1). ... p0172 and p0175. Intermittent hard to start cold. Fuel injection unit updated to mpi about 6 months ago to correct rich codes. Customer does not drive truck much, but cel came on last week, only 1300 miles since repair. Testing fuel pressure is good, but w...
May 05, 2014