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P0172 Diagnostic Trouble Code Discussion for August 2004

Fuel System Rich (Bank 1)


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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2000 Volkswagen Jetta GL 2.0L MIL Lamp on VIN: 3VWSB69M11
P0172: system hit rich limit. We get the check engine light on in five drive cycles, i sheached the fix database at there are two that fixed it with a mass sensor so i bought one and stuck it in. at first we had a lean code after we did the mass now we have a rich code. i checked for fuel ...
August 10, 2004
1999 Jaguar XJ8 4.0L MIL Lamp on VIN: SAJHX6043X
P0172: Rich mixture A bank. Hello Jag Techs, This Jag came in with mil on showing the above codes.Very high fuel pressure at idle,75 lbs. Replaced pressure regulator which reduced idle pressure to 55 lbs.Fuel pressure should be about 29 at idle. I checked fuel return pipes and hoses f...
August 11, 2004
1996 Chevrolet C1500 5.7L Misfire, MIL Lamp on VIN: 2GBEC19R5T
P0172: Fuel Trim System Rich (Bank 1). Vehicle has a definite bad B1/S2 HO2 sensor. Exhibits a missfire, mostly on cyl's 5, 6 &7. It will occur after it warms up to above 150 deg. F. and shows up in park accel lightly from 2500 to 3000 rpms and driving, on light accel or sustaining speed on sli...
August 12, 2004
1999 Jaguar XJ8 4.0L MIL Lamp on VIN: SAJHX6043X
P0172: Rich mixture A bank. Hello Jag Techs, This Jag came in with mil on showing the above codes.Very high fuel pressure at idle,75 lbs. Replaced pressure regulator which reduced idle pressure to 55 lbs.Fuel pressure should be about 29 at idle. I checked fuel return pipes and hoses f...
August 12, 2004
2001 Ford Explorer Sport 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMYU60E41
P0172: systen too rich bank 1. Need some help on this one. Truck came in the shop with check engine light on, and a low idle. I cleaned the MAF with no change. The LTfuel trim is -18%, but the STfuel trim is +3%. I also have a small backfire through the intake.The cylinder leak down test wa...
August 13, 2004
1997 Ford Taurus SHO 3.4L Excessive Emissions, Surge, Stall VIN: 1FALP54N1V
P0172: Sys. rich B1. ... with me. This V-8 Taurus is the first one I'v worked on, I'm begining to hope the last! When I first checked it the only code was P1157, but the car would run decent when first started, then start to run terrible, with black smoke and stalled. Fuel pressur...
August 18, 2004
1997 Ford Taurus SHO 3.4L Excessive Emissions, Surge, Stall VIN: 1FALP54N1V
P0172: Sys. rich B1. ... with me. This V-8 Taurus is the first one I'v worked on, I'm begining to hope the last! When I first checked it the only code was P1157, but the car would run decent when first started, then start to run terrible, with black smoke and stalled. Fuel pressur...
August 19, 2004
1998 Dodge Stratus ES 2.5L Poor Idle Quality, Stall, MIL Lamp on VIN: 1B3EJ56H2W
P0172: Fuel System Rich (Bank 1). ... at idle. We reset base idle and cleaned throttle body, stalling became intermittent but idle continued to be rough. LTFT at idle and low throttle opening drops to -25 and eventually sets P0172 - fuel system rich code. After After checking techhelp database...
August 24, 2004
2000 Pontiac Grand Am GT 3.4L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1G2NV12EBY
P0172: Fuel System Rich. ... lost on this grand am and would really appreciate it if someone could help me see the forest for the trees.The car came in for MIL light on and code p0172 set. In freeze frame data it set at 53 mph with ltft at -16 and stft at -11. At idle the fuel trims a...
August 25, 2004
1998 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1FMZU34E6W
P0172: bank 1 too rich. ... think you have fords figured out they throw you a loop. this explorer came in for a surge and a check engine light. codes p0172, p0175. Scan data indicates ecm is subtracting lots of fuel. -25% under all conditions. checke...
August 27, 2004
2000 Pontiac Grand Am GT 3.4L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1G2NV12EBY
P0172: Fuel System Rich. ... lost on this grand am and would really appreciate it if someone could help me see the forest for the trees.The car came in for MIL light on and code p0172 set. In freeze frame data it set at 53 mph with ltft at -16 and stft at -11. At idle the fuel trims a...
August 28, 2004
1998 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1FMZU34E6W
P0172: bank 1 too rich. ... think you have fords figured out they throw you a loop. this explorer came in for a surge and a check engine light. codes p0172, p0175. Scan data indicates ecm is subtracting lots of fuel. -25% under all conditions. checke...
August 30, 2004
2000 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA514XY
P0172: rich bank one. Repeatedly sets rich codes. Fuel pres. is good, pres. reg. does not leak, evap system ok, no fuel contamination in crankcase,MAF sensor ok. System is in good fuel control with LTFT at -20% (STFT at 0 +or- 5%). It must be getting false fuel somewhere. If I clea...
August 30, 2004
2000 Volkswagen Jetta GL 2.0L MIL Lamp on VIN: 3VWSB69M11
P0172: system hit rich limit. We get the check engine light on in five drive cycles, i sheached the fix database at there are two that fixed it with a mass sensor so i bought one and stuck it in. at first we had a lean code after we did the mass now we have a rich code. i checked for fuel ...
August 10, 2004
1999 Jaguar XJ8 4.0L MIL Lamp on VIN: SAJHX6043X
P0172: Rich mixture A bank. Hello Jag Techs, This Jag came in with mil on showing the above codes.Very high fuel pressure at idle,75 lbs. Replaced pressure regulator which reduced idle pressure to 55 lbs.Fuel pressure should be about 29 at idle. I checked fuel return pipes and hoses f...
August 11, 2004
1996 Chevrolet C1500 5.7L Misfire, MIL Lamp on VIN: 2GBEC19R5T
P0172: Fuel Trim System Rich (Bank 1). Vehicle has a definite bad B1/S2 HO2 sensor. Exhibits a missfire, mostly on cyl's 5, 6 &7. It will occur after it warms up to above 150 deg. F. and shows up in park accel lightly from 2500 to 3000 rpms and driving, on light accel or sustaining speed on sli...
August 12, 2004
1999 Jaguar XJ8 4.0L MIL Lamp on VIN: SAJHX6043X
P0172: Rich mixture A bank. Hello Jag Techs, This Jag came in with mil on showing the above codes.Very high fuel pressure at idle,75 lbs. Replaced pressure regulator which reduced idle pressure to 55 lbs.Fuel pressure should be about 29 at idle. I checked fuel return pipes and hoses f...
August 12, 2004
2001 Ford Explorer Sport 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMYU60E41
P0172: systen too rich bank 1. Need some help on this one. Truck came in the shop with check engine light on, and a low idle. I cleaned the MAF with no change. The LTfuel trim is -18%, but the STfuel trim is +3%. I also have a small backfire through the intake.The cylinder leak down test wa...
August 13, 2004
1997 Ford Taurus SHO 3.4L Excessive Emissions, Surge, Stall VIN: 1FALP54N1V
P0172: Sys. rich B1. ... with me. This V-8 Taurus is the first one I'v worked on, I'm begining to hope the last! When I first checked it the only code was P1157, but the car would run decent when first started, then start to run terrible, with black smoke and stalled. Fuel pressur...
August 18, 2004
1997 Ford Taurus SHO 3.4L Excessive Emissions, Surge, Stall VIN: 1FALP54N1V
P0172: Sys. rich B1. ... with me. This V-8 Taurus is the first one I'v worked on, I'm begining to hope the last! When I first checked it the only code was P1157, but the car would run decent when first started, then start to run terrible, with black smoke and stalled. Fuel pressur...
August 19, 2004
1998 Dodge Stratus ES 2.5L Poor Idle Quality, Stall, MIL Lamp on VIN: 1B3EJ56H2W
P0172: Fuel System Rich (Bank 1). ... at idle. We reset base idle and cleaned throttle body, stalling became intermittent but idle continued to be rough. LTFT at idle and low throttle opening drops to -25 and eventually sets P0172 - fuel system rich code. After After checking techhelp database...
August 24, 2004
2000 Pontiac Grand Am GT 3.4L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1G2NV12EBY
P0172: Fuel System Rich. ... lost on this grand am and would really appreciate it if someone could help me see the forest for the trees.The car came in for MIL light on and code p0172 set. In freeze frame data it set at 53 mph with ltft at -16 and stft at -11. At idle the fuel trims a...
August 25, 2004
1998 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1FMZU34E6W
P0172: bank 1 too rich. ... think you have fords figured out they throw you a loop. this explorer came in for a surge and a check engine light. codes p0172, p0175. Scan data indicates ecm is subtracting lots of fuel. -25% under all conditions. checke...
August 27, 2004
2000 Pontiac Grand Am GT 3.4L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1G2NV12EBY
P0172: Fuel System Rich. ... lost on this grand am and would really appreciate it if someone could help me see the forest for the trees.The car came in for MIL light on and code p0172 set. In freeze frame data it set at 53 mph with ltft at -16 and stft at -11. At idle the fuel trims a...
August 28, 2004
1998 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1FMZU34E6W
P0172: bank 1 too rich. ... think you have fords figured out they throw you a loop. this explorer came in for a surge and a check engine light. codes p0172, p0175. Scan data indicates ecm is subtracting lots of fuel. -25% under all conditions. checke...
August 30, 2004
2000 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA514XY
P0172: rich bank one. Repeatedly sets rich codes. Fuel pres. is good, pres. reg. does not leak, evap system ok, no fuel contamination in crankcase,MAF sensor ok. System is in good fuel control with LTFT at -20% (STFT at 0 +or- 5%). It must be getting false fuel somewhere. If I clea...
August 30, 2004