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P0172 Diagnostic Trouble Code Discussion for April 2005

Fuel System Rich (Bank 1)


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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2001 Volkswagen Jetta GL 2.0L Excessive Emissions, MIL Lamp on VIN: 3VWR529M61
P0172: bank 1 rich. ... for this problem. the first time sensor 1 was not switching. we replaced the front o2 sensor and all fuel trim values returned to normal and the o2 was switching properly. now the vehicle has returned with a p1128 as a cur...
April 04, 2005
1999 Ford F-150 XL 4.2L MIL Lamp on VIN: 1FTZF1722X
... based on a p0304. the miss got worse and when it came to me i found that injecter #4 was stopped up. we replaced injector and fuel filter. after about a week came back to me with these codes p0172 and p0175. runs good, n...
April 05, 2005
1997 Chevrolet K1500 Suburban LS 5.7L Poor Fuel Economy, MIL Lamp on VIN: 1GNFK16R9V
P0172: Fuel Trim System Rich (Bank 1). This vehicle cam to us from a used car lot. had 2 codes for rich banks 1 and 2. We replaced the O2 sensors (per service manager) as a shot in the dark ( I don't like to work that way)The codes, of course, came back. I have checked the Iatn fix database, and se...
April 12, 2005
2000 Infiniti I30 3.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: JNKCA31A5Y
P0172: Fuel Trim Rich (Bank 1). During cold start up, under load, motor stalls. O2 readings oscillate between .5v but shortly there after flatlines to 0.0v at idle and engine does not stall after motor has reached normal operating temp.. When accelerating from idle to [...] O2 sensor reading...
April 13, 2005
1997 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEC19R9V
P0172: Fuel Trim System Rich (Bank 1). i have been working on this car off and on for years. i know its history pretty well. has recently had engine replaced (we did work), complete tune-up, mass airflow, new converters, all 4 o2 sensors, tps replacement. not all were replaced to correct codes but ...
April 19, 2005
2000 Ford F-150 XL 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTZF1825Y
P0172: system too rich bank 1. Hello, fellow techs. Vehicle has constant miss on one or more cylinders. Customer already tuned and replaced EGR, O2 sensor (left bank upstream)and coil pack. Tested spark output at end of plug wires on every cylinder, results good. Checked crank sensor trigge...
April 19, 2005
2000 Ford F-150 XL 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTZF1825Y
P0172: system too rich bank 1. Hello, fellow techs. Vehicle has constant miss on one or more cylinders. Customer already tuned and replaced EGR, O2 sensor (left bank upstream)and coil pack. Tested spark output at end of plug wires on every cylinder, results good. Checked crank sensor trigge...
April 20, 2005
1998 Volvo V70 R 2.3L Hesitation, MIL Lamp on, lacks power VIN: YV1LW5242W
P0172: . A little unsure of the fuel system used on this car. Fuel pressure is low at 20 psi and it falls to 0 when the engine is shut off. Spec that i found was 43 psi and should hold 29 after shut down. Obviously this car barely runs and is hard to start. My question...
April 21, 2005
1999 Volkswagen Jetta GLS 2.0L Hesitation VIN: 3VWSC29M7X
P0172: Short term fuel trim-system too lean. Customer dropped off vehicle and complained about poor running and a real bad hesitation. Verified complaint. Secondary ignition wires were arcing all over. Replaced ignition wires and throughly cleaned coil pack assembly. Checked coolant temp sensor-was readi...
April 25, 2005
1999 Jaguar XJ8 4.0L MIL Lamp on, intermit reduced per VIN: SAJHX104XX
P0172: bank 1 too lean. Hi guys...first time user. Have a little knowledge of Jags and only Alldata for info. There are a couple of things that are odd about this veh. Even though it has one lean and one rich code the LTFT on both banks is at -22% and at a constant cruise the STFT wi...
April 27, 2005
1996 Pontiac Sunfire SE 2.2L Hesitation, Stall, MIL Lamp on VIN: 1G2JB1241T
P0172: Fuel System Rich (Bank 1). ... leaking, so we replace #2 & #4 injectors and changed oil. upon start up vehicle started missing on #3 injector tested good but we replaced it. seemed ok on test drive started missing on #1 so we replaced it as well. car runs good went on 15 mile test d...
April 28, 2005
2001 Volkswagen Jetta GL 2.0L Excessive Emissions, MIL Lamp on VIN: 3VWR529M61
P0172: bank 1 rich. ... for this problem. the first time sensor 1 was not switching. we replaced the front o2 sensor and all fuel trim values returned to normal and the o2 was switching properly. now the vehicle has returned with a p1128 as a cur...
April 04, 2005
1999 Ford F-150 XL 4.2L MIL Lamp on VIN: 1FTZF1722X
... based on a p0304. the miss got worse and when it came to me i found that injecter #4 was stopped up. we replaced injector and fuel filter. after about a week came back to me with these codes p0172 and p0175. runs good, n...
April 05, 2005
1997 Chevrolet K1500 Suburban LS 5.7L Poor Fuel Economy, MIL Lamp on VIN: 1GNFK16R9V
P0172: Fuel Trim System Rich (Bank 1). This vehicle cam to us from a used car lot. had 2 codes for rich banks 1 and 2. We replaced the O2 sensors (per service manager) as a shot in the dark ( I don't like to work that way)The codes, of course, came back. I have checked the Iatn fix database, and se...
April 12, 2005
2000 Infiniti I30 3.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: JNKCA31A5Y
P0172: Fuel Trim Rich (Bank 1). During cold start up, under load, motor stalls. O2 readings oscillate between .5v but shortly there after flatlines to 0.0v at idle and engine does not stall after motor has reached normal operating temp.. When accelerating from idle to [...] O2 sensor reading...
April 13, 2005
1997 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEC19R9V
P0172: Fuel Trim System Rich (Bank 1). i have been working on this car off and on for years. i know its history pretty well. has recently had engine replaced (we did work), complete tune-up, mass airflow, new converters, all 4 o2 sensors, tps replacement. not all were replaced to correct codes but ...
April 19, 2005
2000 Ford F-150 XL 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTZF1825Y
P0172: system too rich bank 1. Hello, fellow techs. Vehicle has constant miss on one or more cylinders. Customer already tuned and replaced EGR, O2 sensor (left bank upstream)and coil pack. Tested spark output at end of plug wires on every cylinder, results good. Checked crank sensor trigge...
April 19, 2005
2000 Ford F-150 XL 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTZF1825Y
P0172: system too rich bank 1. Hello, fellow techs. Vehicle has constant miss on one or more cylinders. Customer already tuned and replaced EGR, O2 sensor (left bank upstream)and coil pack. Tested spark output at end of plug wires on every cylinder, results good. Checked crank sensor trigge...
April 20, 2005
1998 Volvo V70 R 2.3L Hesitation, MIL Lamp on, lacks power VIN: YV1LW5242W
P0172: . A little unsure of the fuel system used on this car. Fuel pressure is low at 20 psi and it falls to 0 when the engine is shut off. Spec that i found was 43 psi and should hold 29 after shut down. Obviously this car barely runs and is hard to start. My question...
April 21, 2005
1999 Volkswagen Jetta GLS 2.0L Hesitation VIN: 3VWSC29M7X
P0172: Short term fuel trim-system too lean. Customer dropped off vehicle and complained about poor running and a real bad hesitation. Verified complaint. Secondary ignition wires were arcing all over. Replaced ignition wires and throughly cleaned coil pack assembly. Checked coolant temp sensor-was readi...
April 25, 2005
1999 Jaguar XJ8 4.0L MIL Lamp on, intermit reduced per VIN: SAJHX104XX
P0172: bank 1 too lean. Hi guys...first time user. Have a little knowledge of Jags and only Alldata for info. There are a couple of things that are odd about this veh. Even though it has one lean and one rich code the LTFT on both banks is at -22% and at a constant cruise the STFT wi...
April 27, 2005
1996 Pontiac Sunfire SE 2.2L Hesitation, Stall, MIL Lamp on VIN: 1G2JB1241T
P0172: Fuel System Rich (Bank 1). ... leaking, so we replace #2 & #4 injectors and changed oil. upon start up vehicle started missing on #3 injector tested good but we replaced it. seemed ok on test drive started missing on #1 so we replaced it as well. car runs good went on 15 mile test d...
April 28, 2005