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P0172 Diagnostic Trouble Code Discussion for October 2012

Fuel System Rich (Bank 1)


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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2001 Ford F-150 King Ranch 5.4L Excessive Emissions VIN: 1FTRW08L31
P0172: Rich exhaust bank1. This thing is rich bank1, o2 voltage going up to 1.6 volts, bank2 is normal, fuel pressure is good, verified cam timing it is ok, I unplugged all injectors and coils on bank1 and it still idles fine, unplugged all 02 sensors and bank1 sensor1 still reads up to...
October 04, 2012
2001 Chrysler Sebring LX 2.7L MIL Lamp on VIN: 1C3EL45U01
P0172: Fuel System Rich (Bank 1). ... give me. . Car came in with 2 trouble codes, p0172, p0175 bank 1 & bank 2 rich. (my scanner defines them as system lean for some reason) customer had replaced both post-cat o2 sensors after a "diagnostic" at autozone. We found vacuum leaks and ...
October 09, 2012
2001 Chrysler Sebring LX 2.7L MIL Lamp on VIN: 1C3EL45U01
P0172: Fuel System Rich (Bank 1). ... give me. . Car came in with 2 trouble codes, p0172, p0175 bank 1 & bank 2 rich. (my scanner defines them as system lean for some reason) customer had replaced both post-cat o2 sensors after a "diagnostic" at autozone. We found vacuum leaks and ...
October 10, 2012
2001 Ford F-150 King Ranch 5.4L Excessive Emissions VIN: 1FTRW08L31
P0172: Rich exhaust bank1. This thing is rich bank1, o2 voltage going up to 1.6 volts, bank2 is normal, fuel pressure is good, verified cam timing it is ok, I unplugged all injectors and coils on bank1 and it still idles fine, unplugged all 02 sensors and bank1 sensor1 still reads up to...
October 11, 2012
1998 Volvo V70 2.4L MIL Lamp on VIN: YV1LW5582W
P0172: Long term fuel trim - upper limit. Replaced both o2 sensors with OE per TSB. Can't get downstream to read anything. Both signal wires ohmed ok. Car runs fine. Are we missing something without OE scan tool? Original Downstream O2 had cracks on the steel case.
October 12, 2012
2008 GMC W3500 Forward W3S042 6.0L MIL Lamp on
P0172: Fuel Trim System Rich Bank 1. Hello all and thank you in advance for any help. This truck has been in for these same problems once before. The customer had it at a dealer in Joliet and they declined replacement of the MAF sensor. I have checked Cat. back pressure and it was less than 2 psi...
October 16, 2012
1995 Pontiac Trans Sport 3.8L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GMDU06LBS
P0172: Fuel Trim Rich. Thanks in advanced for your help. we are mainly a European shop but this minivan belongs to a really good client of ours. Here's the story, this transport runs very rich at idle when hot and at start up. At the same time that is runs rich, it also surges at id...
October 22, 2012
1995 Pontiac Trans Sport 3.8L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GMDU06LBS
P0172: Fuel Trim Rich. Thanks in advanced for your help. we are mainly a European shop but this minivan belongs to a really good client of ours. Here's the story, this transport runs very rich at idle when hot and at start up. At the same time that is runs rich, it also surges at id...
October 23, 2012
2006 GMC Sierra 1500 SLE 5.3L MIL Lamp on VIN: 1GTEK19Z16
P0172: Fuel Trim System Rich (Bank 1). ... great. The Mil light on only two codes [...] P0175, Both banks running rich. The short and long term fuel trims are both neg.long term -19.0 and short term -8.5 at idle. But the truck runs and drive great good power idles fine. I did a smoke test no leaks ...
October 25, 2012
2005 Suzuki Verona LX 2.5L Hesitation, Stall, MIL Lamp on VIN: KL5VJ56L65
P0172: Fuel System Too Rich (Bank 1). ... has brought this vehicle in multiple times for a hesitation on accel and a stalling issue while driving and while stopped. The vehicle has 2 codes,P0176 Bank 2 too rich and p0172 fuel trim too rich. The vehicle has had new ...
October 31, 2012
2001 Ford F-150 King Ranch 5.4L Excessive Emissions VIN: 1FTRW08L31
P0172: Rich exhaust bank1. This thing is rich bank1, o2 voltage going up to 1.6 volts, bank2 is normal, fuel pressure is good, verified cam timing it is ok, I unplugged all injectors and coils on bank1 and it still idles fine, unplugged all 02 sensors and bank1 sensor1 still reads up to...
October 04, 2012
2001 Chrysler Sebring LX 2.7L MIL Lamp on VIN: 1C3EL45U01
P0172: Fuel System Rich (Bank 1). ... give me. . Car came in with 2 trouble codes, p0172, p0175 bank 1 & bank 2 rich. (my scanner defines them as system lean for some reason) customer had replaced both post-cat o2 sensors after a "diagnostic" at autozone. We found vacuum leaks and ...
October 09, 2012
2001 Chrysler Sebring LX 2.7L MIL Lamp on VIN: 1C3EL45U01
P0172: Fuel System Rich (Bank 1). ... give me. . Car came in with 2 trouble codes, p0172, p0175 bank 1 & bank 2 rich. (my scanner defines them as system lean for some reason) customer had replaced both post-cat o2 sensors after a "diagnostic" at autozone. We found vacuum leaks and ...
October 10, 2012
2001 Ford F-150 King Ranch 5.4L Excessive Emissions VIN: 1FTRW08L31
P0172: Rich exhaust bank1. This thing is rich bank1, o2 voltage going up to 1.6 volts, bank2 is normal, fuel pressure is good, verified cam timing it is ok, I unplugged all injectors and coils on bank1 and it still idles fine, unplugged all 02 sensors and bank1 sensor1 still reads up to...
October 11, 2012
1998 Volvo V70 2.4L MIL Lamp on VIN: YV1LW5582W
P0172: Long term fuel trim - upper limit. Replaced both o2 sensors with OE per TSB. Can't get downstream to read anything. Both signal wires ohmed ok. Car runs fine. Are we missing something without OE scan tool? Original Downstream O2 had cracks on the steel case.
October 12, 2012
2008 GMC W3500 Forward W3S042 6.0L MIL Lamp on
P0172: Fuel Trim System Rich Bank 1. Hello all and thank you in advance for any help. This truck has been in for these same problems once before. The customer had it at a dealer in Joliet and they declined replacement of the MAF sensor. I have checked Cat. back pressure and it was less than 2 psi...
October 16, 2012
1995 Pontiac Trans Sport 3.8L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GMDU06LBS
P0172: Fuel Trim Rich. Thanks in advanced for your help. we are mainly a European shop but this minivan belongs to a really good client of ours. Here's the story, this transport runs very rich at idle when hot and at start up. At the same time that is runs rich, it also surges at id...
October 22, 2012
1995 Pontiac Trans Sport 3.8L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GMDU06LBS
P0172: Fuel Trim Rich. Thanks in advanced for your help. we are mainly a European shop but this minivan belongs to a really good client of ours. Here's the story, this transport runs very rich at idle when hot and at start up. At the same time that is runs rich, it also surges at id...
October 23, 2012
2006 GMC Sierra 1500 SLE 5.3L MIL Lamp on VIN: 1GTEK19Z16
P0172: Fuel Trim System Rich (Bank 1). ... great. The Mil light on only two codes [...] P0175, Both banks running rich. The short and long term fuel trims are both neg.long term -19.0 and short term -8.5 at idle. But the truck runs and drive great good power idles fine. I did a smoke test no leaks ...
October 25, 2012
2005 Suzuki Verona LX 2.5L Hesitation, Stall, MIL Lamp on VIN: KL5VJ56L65
P0172: Fuel System Too Rich (Bank 1). ... Verona with a 2.5L. The customer has brought this vehicle in multiple times for a hesitation on accel and a stalling issue while driving and while stopped. The vehicle has 2 codes,P0176 Bank 2 too rich and p0172 fuel trim too rich. The vehicle has had new ...
October 31, 2012