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P0172 Diagnostic Trouble Code Discussion for September 2009

Fuel System Rich (Bank 1)


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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2004 Ford Taurus SES 3.0L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1FAHP55S64
P0172: bank 1 rich. Need HELP!!!I have a 2004 Taurus running very rich. Fuel trim on both banks max out, o2 sensors go up to 990mv fuel pressure is within spec. Engine idles smooth to be running so rich.I do not have a gas anylizer to check tail pipe emissions.This is a Calf. emi...
September 02, 2009
2004 Ford Expedition XLT 4.6L No Start VIN: 1FMPU16W54
P0172: bank one rich. Hello ford techs think I know the answer just want a sec oppinion. No start no fuel no power at inertia switch. Relay not in CJB in kick pannel I think it is part of CJB. No fuse in #9 cavity for relay replaced still nothing. I find that weird but moving on. W...
September 02, 2009
1993 Ford Thunderbird LX 3.8L Poor Idle Quality, Surge, Stall VIN: 1FAPP6245P
P0172: oxygen sensor not switching. this car came in with poor idle conditions - on first scan found both o2s bad & dpfe sensor not working - replaced them & still had rough idle unpluged maf & computer goes directly into closed loop & runs fine plug maf back in & about 2 min...
September 03, 2009
1993 Ford Thunderbird LX 3.8L Poor Idle Quality, Surge, Stall VIN: 1FAPP6245P
P0172: oxygen sensor not switching. this car came in with poor idle conditions - on first scan found both o2s bad & dpfe sensor not working - replaced them & still had rough idle unpluged maf & computer goes directly into closed loop & runs fine plug maf back in & about 2 min...
September 04, 2009
2001 Honda CR-V LX 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: JHLRD18441
P0172: Fuel System Too Rich (Bank 1). This is a used car I just looked over. Not experienced with MAP systems being a Nissan tech. Vehicle originally had low idle and almost complete stall at stops. Changed idle speed and now idles better. Vehicle then threw a rich code and fuel trims short and ...
September 04, 2009
2003 Mercury Sable LS 3.0L MIL Lamp on VIN: 1MEFM55323
P0172: rich. ... service providers. After a short run time, fuel pressure goes to 70 psi at idle. Fuel pump replaced, replaced maf sensor, as recommended in many forms, replace fuel pressure regulator. No TSB's for P0172/P0175. Service provider asked me to update computer ...
September 15, 2009
2003 Chevrolet Silverado 1500 4.8L Surge, Misfire VIN: 2GCEC19V83
P0172: Fuel Trim System Rich (Bank 1). ... misfire code present at first. codes p0172, p0175 rich b1, b2. a surging idle that gets worse as it warms up. also surges on acceleration up to about 2000 rpm, then is only felt occasionally at higher speeds. checked tune-up, r...
September 18, 2009
2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: IGNDS13S34
P0172: Fuel System Rich (Bank 1). ... I never even heard before!!! The fuel pressure is steady 57 @ idle, and 50@ cruise!!! The fuel trim goes very hi on cruise (20 st and 27 lt), and sets codes for rich and lean system. Also sets code p1133 O2 not switching...
September 18, 2009
2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: IGNDS13S34
P0172: Fuel System Rich (Bank 1). ... I never even heard before!!! The fuel pressure is steady 57 @ idle, and 50@ cruise!!! The fuel trim goes very hi on cruise (20 st and 27 lt), and sets codes for rich and lean system. Also sets code p1133 O2 not switching...
September 21, 2009
1997 Chevrolet Blazer 4.3L Hesitation, Misfire, MIL Lamp on VIN: 1GNCS13W1V
P0172: Fuel System Rich (Bank 1). One yr later here it sits with the same p0300 and its misfiring on cyl #3 & #4. #4 is the worst with a count of over 1700. #3 is around 350 and all others are at 0. ive watched the o2 sensors. post cat sensor indicates bad cat. Checked for back pressure no...
September 24, 2009
2005 Ford Five Hundred SEL 3.0L MIL Lamp on VIN: 1FAFP24155
P0172: Lean Bank 1. Typical Ford with P0172 & P0174 codes. I've diagnosed tons of these with no problem, but this one I'm stuck on. LTFT readings are at 25 both banks, hot and cold, idling and driving. I smoke tested the intake system, no leaks. Blocked off PCV valve, no chan...
September 24, 2009
1998 Plymouth Breeze 2.4L Poor Idle Quality, Stall, MIL Lamp on VIN: 1P3EJ46XXW
P0172: Fuel System Rich. ... code p0172 rich exhust,put o2 sensor on it,and egr valve,timeing is right.cleaned throtle body and injecters,adjusted idle put treement in gas tank told him to drive, came back with code p0172,readings on o2 show to be good,i need help,this car sill idles ...
September 25, 2009
2004 Ford Taurus SES 3.0L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1FAHP55S64
P0172: bank 1 rich. Need HELP!!!I have a 2004 Taurus running very rich. Fuel trim on both banks max out, o2 sensors go up to 990mv fuel pressure is within spec. Engine idles smooth to be running so rich.I do not have a gas anylizer to check tail pipe emissions.This is a Calf. emi...
September 02, 2009
2004 Ford Expedition XLT 4.6L No Start VIN: 1FMPU16W54
P0172: bank one rich. Hello ford techs think I know the answer just want a sec oppinion. No start no fuel no power at inertia switch. Relay not in CJB in kick pannel I think it is part of CJB. No fuse in #9 cavity for relay replaced still nothing. I find that weird but moving on. W...
September 02, 2009
1993 Ford Thunderbird LX 3.8L Poor Idle Quality, Surge, Stall VIN: 1FAPP6245P
P0172: oxygen sensor not switching. this car came in with poor idle conditions - on first scan found both o2s bad & dpfe sensor not working - replaced them & still had rough idle unpluged maf & computer goes directly into closed loop & runs fine plug maf back in & about 2 min...
September 03, 2009
1993 Ford Thunderbird LX 3.8L Poor Idle Quality, Surge, Stall VIN: 1FAPP6245P
P0172: oxygen sensor not switching. this car came in with poor idle conditions - on first scan found both o2s bad & dpfe sensor not working - replaced them & still had rough idle unpluged maf & computer goes directly into closed loop & runs fine plug maf back in & about 2 min...
September 04, 2009
2001 Honda CR-V LX 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: JHLRD18441
P0172: Fuel System Too Rich (Bank 1). This is a used car I just looked over. Not experienced with MAP systems being a Nissan tech. Vehicle originally had low idle and almost complete stall at stops. Changed idle speed and now idles better. Vehicle then threw a rich code and fuel trims short and ...
September 04, 2009
2003 Mercury Sable LS 3.0L MIL Lamp on VIN: 1MEFM55323
P0172: rich. ... service providers. After a short run time, fuel pressure goes to 70 psi at idle. Fuel pump replaced, replaced maf sensor, as recommended in many forms, replace fuel pressure regulator. No TSB's for P0172/P0175. Service provider asked me to update computer ...
September 15, 2009
2003 Chevrolet Silverado 1500 4.8L Surge, Misfire VIN: 2GCEC19V83
P0172: Fuel Trim System Rich (Bank 1). ... misfire code present at first. codes p0172, p0175 rich b1, b2. a surging idle that gets worse as it warms up. also surges on acceleration up to about 2000 rpm, then is only felt occasionally at higher speeds. checked tune-up, r...
September 18, 2009
2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: IGNDS13S34
P0172: Fuel System Rich (Bank 1). ... I never even heard before!!! The fuel pressure is steady 57 @ idle, and 50@ cruise!!! The fuel trim goes very hi on cruise (20 st and 27 lt), and sets codes for rich and lean system. Also sets code p1133 O2 not switching...
September 18, 2009
2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: IGNDS13S34
P0172: Fuel System Rich (Bank 1). ... I never even heard before!!! The fuel pressure is steady 57 @ idle, and 50@ cruise!!! The fuel trim goes very hi on cruise (20 st and 27 lt), and sets codes for rich and lean system. Also sets code p1133 O2 not switching...
September 21, 2009
1997 Chevrolet Blazer 4.3L Hesitation, Misfire, MIL Lamp on VIN: 1GNCS13W1V
P0172: Fuel System Rich (Bank 1). One yr later here it sits with the same p0300 and its misfiring on cyl #3 & #4. #4 is the worst with a count of over 1700. #3 is around 350 and all others are at 0. ive watched the o2 sensors. post cat sensor indicates bad cat. Checked for back pressure no...
September 24, 2009
2005 Ford Five Hundred SEL 3.0L MIL Lamp on VIN: 1FAFP24155
P0172: Lean Bank 1. Typical Ford with P0172 & P0174 codes. I've diagnosed tons of these with no problem, but this one I'm stuck on. LTFT readings are at 25 both banks, hot and cold, idling and driving. I smoke tested the intake system, no leaks. Blocked off PCV valve, no chan...
September 24, 2009
1998 Plymouth Breeze 2.4L Poor Idle Quality, Stall, MIL Lamp on VIN: 1P3EJ46XXW
P0172: Fuel System Rich. ... code p0172 rich exhust,put o2 sensor on it,and egr valve,timeing is right.cleaned throtle body and injecters,adjusted idle put treement in gas tank told him to drive, came back with code p0172,readings on o2 show to be good,i need help,this car sill idles ...
September 25, 2009