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P0172 Diagnostic Trouble Code Discussion for February 2013

Fuel System Rich (Bank 1)


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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2002 Ford Explorer XLS 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU72E92
P0172: System Rich Bank 1. Ok guys, thanks for the help on this one. Here is the story; this is my own car, I bought this car from a customer last year who could not afford to pay his bill, and was going to scrap it. The timing chain guides broke and crashed the valves. Since the genius...
February 06, 2013
2002 Ford Explorer XLS 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU72E92
P0172: System Rich Bank 1. Ok guys, thanks for the help on this one. Here is the story; this is my own car, I bought this car from a customer last year who could not afford to pay his bill, and was going to scrap it. The timing chain guides broke and crashed the valves. Since the genius...
February 15, 2013
2003 Mazda Protege5 2.0L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: JM1BJ24523
P0172: Adaptive Fuel Trim Too Rich (Bank 1). ... interesting problem. I get tons of lean codes, but hardly ever find rich codes in cars these days. This one has a p0172:system rich bank 1. Fuel trims are way negative: LT= -25%, short term fluctuates between -12% and -20%. Fuel pressure is about 50psi eng...
February 21, 2013
2003 Mazda Protege5 2.0L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: JM1BJ24523
P0172: Adaptive Fuel Trim Too Rich (Bank 1). ... interesting problem. I get tons of lean codes, but hardly ever find rich codes in cars these days. This one has a p0172:system rich bank 1. Fuel trims are way negative: LT= -25%, short term fluctuates between -12% and -20%. Fuel pressure is about 50psi eng...
February 22, 2013
2001 Ford F-250 Super Duty Lariat 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTNX21L81
P0172: Bank 1 Rich. This 5.4 has a strange problem, It runs great but intermittently it will at idle began to lose cyl #1 through #4, Cylinder contribution will show 25-35% loss and will idle very poorly, Then will clear up and run great, idle in shop for 10 minutes and all the s...
February 27, 2013
2002 Ford Explorer XLS 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU72E92
P0172: System Rich Bank 1. Ok guys, thanks for the help on this one. Here is the story; this is my own car, I bought this car from a customer last year who could not afford to pay his bill, and was going to scrap it. The timing chain guides broke and crashed the valves. Since the genius...
February 06, 2013
2002 Ford Explorer XLS 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU72E92
P0172: System Rich Bank 1. Ok guys, thanks for the help on this one. Here is the story; this is my own car, I bought this car from a customer last year who could not afford to pay his bill, and was going to scrap it. The timing chain guides broke and crashed the valves. Since the genius...
February 15, 2013
2003 Mazda Protege5 2.0L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: JM1BJ24523
P0172: Adaptive Fuel Trim Too Rich (Bank 1). ... interesting problem. I get tons of lean codes, but hardly ever find rich codes in cars these days. This one has a p0172:system rich bank 1. Fuel trims are way negative: LT= -25%, short term fluctuates between -12% and -20%. Fuel pressure is about 50psi eng...
February 21, 2013
2003 Mazda Protege5 2.0L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: JM1BJ24523
P0172: Adaptive Fuel Trim Too Rich (Bank 1). ... interesting problem. I get tons of lean codes, but hardly ever find rich codes in cars these days. This one has a p0172:system rich bank 1. Fuel trims are way negative: LT= -25%, short term fluctuates between -12% and -20%. Fuel pressure is about 50psi eng...
February 22, 2013
2001 Ford F-250 Super Duty Lariat 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTNX21L81
P0172: Bank 1 Rich. This 5.4 has a strange problem, It runs great but intermittently it will at idle began to lose cyl #1 through #4, Cylinder contribution will show 25-35% loss and will idle very poorly, Then will clear up and run great, idle in shop for 10 minutes and all the s...
February 27, 2013