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P0172 Diagnostic Trouble Code Discussion for February 2010

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2000 Nissan Altima GXE 2.4L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: JN1CA31D2Y
P0172: Fuel Trim Rich (Bank 1). hi tech. this vehicle stall right after start when temp is cold. if you keep accelerate it. after it get warm up, it ok.then no problem if weather is hot then it stable. i have not start it yet. when open the spark plug they were all black like running rich. a...
February 04, 2010
2006 Chevrolet Impala LT 3.5L MIL Lamp on VIN: 2G1WT58K76
P0172: Fuel System Rich. code p0172 system too rich, but if i disconect the evap solenoid that code's gone. i put new o2 sensor check fuel pressure, i did almost everything. going crazy on this one.. i'll appreciate any help. tnx amigos.
February 05, 2010
1999 Ford Taurus LX 3.0L MIL Lamp on VIN: 1FAFP52U9X
P0172: system too rich bank 1. trim numbers are negative. long term can run at -25 at times. most fords I've seen go lean not rich, so I'm not sure on this one. the frt o/2 sensors show normal fluctuations but the rear ones at times read high and steady. I replaced one rear sensor because t...
February 09, 2010