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International Automotive Technicians Network

P0172 Diagnostic Trouble Code Discussion for September 2005

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
1998 Volkswagen Beetle 2.0L MIL Lamp on VIN: 3VWBB61C0W
P0172: pending system always rich bank 1. help fellow techs,we are not real strong on vw.it takes about two weeks for this two happen ,and it always happens on the same hill at the same spot,about half way up.every thing on scan tool looks ok .except freeze frame lt fuel trim was at 25%.i think either...
September 07, 2005
2001 Oldsmobile Intrigue GX 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3WH52H81
P0172: Fuel Trim System Rich. This is been a fun one. Car came in with SES light on PO172. Long term fuel trim stays near -16. I have tested all of the injectors for flow and leak down. Flow is almost exactly the same on all 6. No pressure leakdown at all. Pressre regulator is not leaking....
September 09, 2005
1998 Volvo S70 2.4L MIL Lamp on VIN: YV1LS5586W
P0172: system too rich bank 1. hi techs mil light on code po172b-system too rich-bank1 but system is in bank2. have checked iatn archives. have replaced vac hoses to brake booster and purge valve. no vac leaks detected. no other indications of vechhicle running rich. b1/upstream o2 sensor f...
September 13, 2005
1996 Dodge Ram 1500 5.2L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1B7HF16Y4T
P0172: fuel system rich. This is the same vehicle I asked for help last month. Same code came back. I drove this vehicle for 8 days and it ran fine and fuel trims were good. 3 days after returning it to my father in-law the light came back on. Found the fuel trims (short and long) -1...
September 20, 2005
1997 Saab 900 SE Turbo 2.0L Misfire, stumble VIN: YS3DF78N9V
P0172: long term fuel trimmin valueair fuel mix to rich. dear iatn readers and writers.stuck on this car and i do not want to give up please help my.did change the dis cassete with four new(bcpr7es ngk )sparkplugs,crankshaft position sensor.map sensor,throttle position sensor,coolant temp sensor (the one between the...
September 25, 2005
1999 Chrysler Concorde LX 2.7L MIL Lamp on VIN: 2C3HD46R9X
P0172: Fuel System Rich (Bank 1). car originally came in failed emissions for trouble code. miss fire cyl. #3 and driver problem. pulled plenum and found open #3 injector and replaced. plugs were original so replaced for maintence. now long term fuel trim will go down and stick around -25 and ...
September 27, 2005
2003 Mercury Mountaineer 4.0L MIL Lamp on
P0172: bank 2 at rich limit. ready to give up on this one. running rich at all times. suprisingly, it runs perfect. purrs like kitten. the only data that is out of whack is the long and short fuel trims. I thought the fuel press was a little high but according to ford and mitchell on dema...
September 27, 2005