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P0172 Diagnostic Trouble Code Discussion for December 2008

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
1996 Toyota RAV4 2.0L Excessive Emissions, Surge, Poor Fuel Economy VIN: V5T0072675
P0172: Fuel System Too Rich (Bank 1). Customer took vehicle to the dealership and they told him that the check engine light was on because we had left the timing belt off by one tooth, after of course they stuck him with O2 sensors and couldnt find another reason for the rich running condition. To...
December 03, 2008
2000 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1G2NF52T6Y
P0172: Fuel System Rich. Car is running very rough , with a idle that is surging or running up and down. Also running very rich. Scanner shows all 4 cyl are missfiring. Found broken vacuum hose to map,dirty throtle body , and two quarts low on oil. Remedied all these items, and also c...
December 04, 2008
2003 Ford Expedition Eddie Bauer 4.6L Excessive Emissions, Misfire, MIL Lamp on VIN: 1FMRU17W13
P0172: Bank 1 rich. Well, got this expedition in couple days ago. All the codes listed above were present. Engine skipping, low power. Scan PID's showed Bank 1 running very rich- LTFT- -25%, Bank 2 running lean- LTFT- +15% to +25%. Vacuum gauge shows a steady 18in. Fuel pressure ...
December 05, 2008
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S82
P0172: Fuel System Rich (Bank 1). ... passing emmision test,I scanned it and it showed thre [...],P0172 and P0340,I did order the cam sensor and did not install it yet,but I'm testing the fuel trims and can not figure out why it is lean and rich at the same time,checked fuel pressure,smoke tes...
December 09, 2008
2007 Chevrolet Monte Carlo LS 3.5L Excessive Emissions, MIL Lamp on VIN: 2G1WJ15KX7
P0172: Fuel System Rich. Hello fello iATN members. This Monte Carlo is giving me some unknown grief. The engine runs rich at all times, enough to set a code in idle or non-idle conditions. The engine seems to run ok, no hesitation etc. I have not been able to determine anything wrong ...
December 15, 2008
2001 Volkswagen Cabrio GLX 2.0L MIL Lamp on VIN: 3VWDC21V41
P0172: system too rich bank 1. Car first came in with above codes and a bunch of short to ground codes. Replaced main relay and no more short codes but still getting the Mass air flow and fuel trim codes. On test drives i have noticed that the fuel trim is fine for a while but then seems to...
December 19, 2008