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P0172 Diagnostic Trouble Code Discussion for February 2012

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2005 Ford Expedition XLT 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMPU15505
P0172: rich bank 1. eng has a miss for sure #3, changed coils #3 with #1 still has miss.Fuel pressure in range.Cleaned injectors while there no change will check compression but at Idle cyls 1 thru 4 same bank show minus contribution at idle .cant find a vac leak and when rpms go...
February 06, 2012
2000 Dodge Intrepid 2.7L MIL Lamp on VIN: 2C3HH46R0Y
P0172: Fuel System Rich (Bank 1). I'm not sure if this has anything to do with o2 codes, but the car came in about 2 weeks ago with check engine light on and codes po172 1nd po173. It also wouldn't heat, low engine temp. I replaced the thermostat and got good engine temp and heater operation. ...
February 08, 2012
2004 GMC Sierra 2500 SLE 6.0L Poor Idle Quality, Misfire VIN: 1GTHC24U54
P0172: Fuel Trim System Rich (Bank 1). Truck has rough idle and LTFT -12 both banks .Also has lack of power. Sometimes fuel trims will go back to normal at about -4 LTFT Drop exhaust to check for plugged cat. ok. Went for another test drive and LTFT is now +15 on both banks. MAF sensor was replaced...
February 14, 2012
2006 Chevrolet Express 1500 4.3L flooding out VIN: 1GCFG15X36
P0172: Fuel Trim System Rich (Bank 1). hey guys looking for ideas to get at underlying problem of this van. Randomly this van will flood out. Have tuned it up new coil fuel pressure is 55 key off jumps up to 62 when first turn key on. Customer states that the van has never run better, but every mon...
February 15, 2012