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P0172 Diagnostic Trouble Code Discussion for December 2010

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2002 Mazda Protege5 2.0L MIL Lamp on VIN: JM1BJ24652
P0172: Adaptive Fuel Trim Too Rich (Bank 1). Car came in a while back with p0172, I found a bad vacuum hose to Fuel pressure regulator, so I changed it and sent her on her way, She came back with same code next day. I have tested and found no fault with the following- Fuel pressure,o2 sensor (upstream),C...
December 15, 2010
2006 Ford E-250 5.4L Excessive Emissions, Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1FTNE24L16
P0172: System too rich. ... misfire and MIL light on. Scan vehicle with OTC scan tool and no misfires present but there where 2 codes present P0172, and P0731. Vehicle drives like a misfire and idles like a misfire and this has my tech a little confused.
December 21, 2010
2002 Chevrolet Silverado 1500 5.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 2GCEK19T72
P0172: Fuel Trim System Rich (Bank 1). This vehicle has a terrible miss upon cold start below 45 degrees. It will miss,load up,stall and run terrible til it is warmed up. Looking at the misfire counter it shows all cylinders missing until it gets to operating temp. This truck has done this for the ...
December 23, 2010
2003 Ford F-150 XL 5.4L MIL Lamp on VIN: 1FTRW08L23
P0172: Rich Bank 1. ... idle with P0172 rich bank 1 , fuel pressure seems ok , regulator responds to WOT ,no leak into vacume line , evap line to intake doesnt show any sign of leaking fuel into intake.The Air filter is not clogged ,Fuel trim is -25 for bank 1 and +25 for bank 2....
December 27, 2010
2002 Ford Explorer Eddie Bauer 4.0L Misfire, MIL Lamp on VIN: 1FMDU74E12
P0172: rich bank 1. ineed some help from you ford guys. this thing is dumping fuel on bank one. i replaced both 02 sensors on that side because they both showed no activity, no change. fuel pressure is within range so i don't think it's the regulator. the egr is working as it sho...
December 29, 2010
2006 Hyundai Tucson GL 2.0L MIL Lamp on VIN: KM81N72046
P0172: Fuel System Too Rich (Bank 1). Tested MAF air sensor was below what some people thought it should be. Installed new unit from Hyundai. Fuel trim went down to 8% Thought we had it. Light came on in 5 miles.tried 2 new O2 sensors B1 & B2 thinking they might be switching too slow. Same pro...
December 30, 2010