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P0172 Diagnostic Trouble Code Discussion for March 2010

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2002 Subaru Impreza WRX 2.0L Poor Idle Quality, Hesitation, Cuts out, MIL Lamp on VIN: JF1GD29662
P0172: Fuel System Too Rich (Bank 1). Vehicle came in with a P0172. Replaced MAF sensor, vehicle came back with the same code. Vehicle runs rich at idle and under cruise during which time the front A/F sensor is roughly 3.8v and STFT runs -24 at times. Under WOT conditions, the A/F sensor reads ab...
March 11, 2010
1999 Ford F-150 4.2L MIL Lamp on VIN: 1FTZX1720X
P0172: . ... for codes, p0171, p0172 both stored. checked for usual vacuum leaks at pcv hose and around intake gaskets. monitored both o2 sensors and maf meter. all appears to be within spec and working. truck is running ok and no other symptoms occour. Any help will s...
March 12, 2010