Join Now
International Automotive Technicians Network

P0172 Diagnostic Trouble Code Discussion for December 2006

Fuel System Rich (Bank 1)


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0172
Help Request Posted
1997 Chevrolet S10 LS 2.2L No Start VIN: 1GCCS1942V
P0172: Fuel System Rich. Good day GM Techs! I have a S10 pickup with a cranks, no start condition. Has good spark. No fuel pressure. When I hook up the fuel pump check connector, the pump runs and vehicle fires right up. OK, my question is, what does the ECU look at to determine if i...
December 04, 2006
2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNET16S23
P0172: Fuel System Rich (Bank 1). This Trailblazer has a reoccuring P0172 code. STFT & LTFT always more negative than positive. Fuel trim index fluctuates between -9 & -17 but I have never seen it as low as -35 which is what it takes to flag P0172. Even looking at freeze data it will n...
December 08, 2006
2002 Buick Rendezvous CX 3.4L MIL Lamp on VIN: 3G5DB03E32
P0172: Fuel Trim System Rich (Bank 1). I suspect the gas tank vent has a problem . My question is there something that keeps liquid from coming out?
December 19, 2006
2000 Nissan Maxima GLE 3.0L Excessive Emissions, Cuts out, Stall VIN: JN1CA31A9Y
P0172: Fuel Trim Rich (Bank 1). after o2 sensors test fuel pressure ok,test maf 1.6v at idle and rises as expected with threottle opening.no drop outs or glithches.will be idling ok then just stall out. any ideas would be appeciated
December 20, 2006
1996 Pontiac Sunfire SE 2.2L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: IG2JB1248T
P0172: Fuel System Rich (Bank 1). ... of the mil light on and stalling at times. We scanned the car to find code p0172 and p0301. We found the #1 injector to be bad and replaced the injector. The injector was put in without the lower o-ring and one thing lead to another an the engine was hydro...
December 22, 2006
2003 Dodge Ram 1500 Truck 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1D7HU18D03
P0172: Fuel System Rich (Bank 1). Hello, This truck idles like more than one cylinder is misfiring. Code p0206 was present, but doesn't come back after erasing. The diagnostic chart basically says if the injector is being supplied power, and controlled ground, replace the injector. Has anyone ...
December 26, 2006
1996 Pontiac Sunfire SE 2.2L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: IG2JB1248T
P0172: Fuel System Rich (Bank 1). ... of the mil light on and stalling at times. We scanned the car to find code p0172 and p0301. We found the #1 injector to be bad and replaced the injector. The injector was put in without the lower o-ring and one thing lead to another an the engine was hydro...
December 26, 2006
2003 Saturn Vue 2.2L Poor Fuel Economy, MIL Lamp on VIN: 5GZCZ23D23
P0172: Fuel Trim System Rich (Bank 1). Vehicle came in with p0172 and a complaint about poor gas mileage. We found a vacuum leak at the intake manifold cyl#1. After repairing the leak a smaller vacuum leak was also found at the injector o-rings. Now at idle the fuel trims all stay normal and even a...
December 29, 2006
1997 Chevrolet S10 LS 2.2L No Start VIN: 1GCCS1942V
P0172: Fuel System Rich. Good day GM Techs! I have a S10 pickup with a cranks, no start condition. Has good spark. No fuel pressure. When I hook up the fuel pump check connector, the pump runs and vehicle fires right up. OK, my question is, what does the ECU look at to determine if i...
December 04, 2006
2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNET16S23
P0172: Fuel System Rich (Bank 1). This Trailblazer has a reoccuring P0172 code. STFT & LTFT always more negative than positive. Fuel trim index fluctuates between -9 & -17 but I have never seen it as low as -35 which is what it takes to flag P0172. Even looking at freeze data it will n...
December 08, 2006
2002 Buick Rendezvous CX 3.4L MIL Lamp on VIN: 3G5DB03E32
P0172: Fuel Trim System Rich (Bank 1). I suspect the gas tank vent has a problem . My question is there something that keeps liquid from coming out?
December 19, 2006
2000 Nissan Maxima GLE 3.0L Excessive Emissions, Cuts out, Stall VIN: JN1CA31A9Y
P0172: Fuel Trim Rich (Bank 1). after o2 sensors test fuel pressure ok,test maf 1.6v at idle and rises as expected with threottle opening.no drop outs or glithches.will be idling ok then just stall out. any ideas would be appeciated
December 20, 2006
1996 Pontiac Sunfire SE 2.2L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: IG2JB1248T
P0172: Fuel System Rich (Bank 1). ... of the mil light on and stalling at times. We scanned the car to find code p0172 and p0301. We found the #1 injector to be bad and replaced the injector. The injector was put in without the lower o-ring and one thing lead to another an the engine was hydro...
December 22, 2006
2003 Dodge Ram 1500 Truck 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1D7HU18D03
P0172: Fuel System Rich (Bank 1). Hello, This truck idles like more than one cylinder is misfiring. Code p0206 was present, but doesn't come back after erasing. The diagnostic chart basically says if the injector is being supplied power, and controlled ground, replace the injector. Has anyone ...
December 26, 2006
1996 Pontiac Sunfire SE 2.2L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: IG2JB1248T
P0172: Fuel System Rich (Bank 1). ... of the mil light on and stalling at times. We scanned the car to find code p0172 and p0301. We found the #1 injector to be bad and replaced the injector. The injector was put in without the lower o-ring and one thing lead to another an the engine was hydro...
December 26, 2006
2003 Saturn Vue 2.2L Poor Fuel Economy, MIL Lamp on VIN: 5GZCZ23D23
P0172: Fuel Trim System Rich (Bank 1). Vehicle came in with p0172 and a complaint about poor gas mileage. We found a vacuum leak at the intake manifold cyl#1. After repairing the leak a smaller vacuum leak was also found at the injector o-rings. Now at idle the fuel trims all stay normal and even a...
December 29, 2006