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P0172 Diagnostic Trouble Code Discussion for July 2009

Fuel System Rich (Bank 1)


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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2004 Honda Pilot EX 3.5L MIL Lamp on VIN: 2HKYF18744
P0172: Fuel System Too Rich (Bank 1). ... check engine light on. Had misfire codes (p0302,305,306) and fuel trim rich (p0172). Replace plugs for maint. Clear codes and road test to reset monitors. P0172 comes back on(no misfire codes, no misfire) after extended road test. Check for vaccum leaks, l...
July 11, 2009
1999 Dodge Ram 1500 Truck 3.9L Hesitation, MIL Lamp on, Loss of power/ VIN: 2B4HB15X9X
P0172: Fuel System Rich (Bank 1). ... runs rough at times. Boggs out after driving 10 min or so. Popps back through TBI for 30 sec or less and then takes off. Feels like it's bogging down during the backfiring. We replaced the cap and rotor, pre cat O2 sensor,CAT converter, and the coil. all w...
July 13, 2009
1996 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Misfire VIN: 2GCEK19R0T
P0172: Fuel Trim System Rich (Bank 1). about 2 months ago customer complaint was that the engine was misfiring. We could watch the misfire start on cylinders 5 and 7 then move to 1 and 3 as the vehicle warmed up. Fuel pressure and secondary ignition system are good. compression is good. We replaced...
July 15, 2009
2003 Dodge Ram 2500 Truck 5.7L No Start, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3D7KU28D03
P0172: Fuel System Rich (Bank 1). ... fit. I have 3 scanners, snap-on brick, cheap Auto X-Ray, and OTC Pegysis. Only the Pegysis will communicate (its a dodge). The code that it pulls is P0172 and says it LEAN B1. Im confused about that one. It also will not idle or start without pressig the g...
July 20, 2009
2001 Mercedes-Benz C240 2.6L Poor Idle Quality, MIL Lamp on VIN: WDBRF61J41
P0172: bank 1 rich. hello to all, this car has a rough idle hot or cold, in gear or park. the fuel pressure is 60 psi which is good. the ltft is 13.3 bank 1 and 11.7 bank 2. we smoked tested the engine for vacum leaks and there was smoke comming from the egr valave. if we opened...
July 22, 2009
1998 Dodge Neon High Line 2.0L Poor Idle Quality, Stall, MIL Lamp on, Low idle vacuum VIN: 1P3ES47C0W
P0172: Fuel System Rich (Bank 1). CS this problem started recently on a trip up north (from 1100 feet to 5500 feet). I suspected the timing belt had jumped a tooth or two. This was not the case. Timing marks line up perfectly. I have sprayed carb spray around the intake with no improvement in ...
July 23, 2009
1996 Lexus LS400 4.0L Hesitation VIN: JT8BH22F9T
P0172: Fuel System Too Rich (Bank 1). ... the customer and then the check engine light came on. P0172 Rich bank #1 They drove it for about three days and they said it ran great. Then one day it was having a hard time accelerating and also they thought it would stall. I have it and it ran fine to t...
July 28, 2009
2004 Cadillac SRX 4.6L MIL Lamp on VIN: 1JFGTYXMNC
P0172: Fuel Trim System Rich (Bank 1). ... that keeps coming back with P0172,P0175 codes.Acording to costomer tune up was done 20k miles ago with ac delco plugs. I replaced both upstream o2 with bosch with are same ones it had before. Replaced mass air flow sensor with OE part to no avail. This is ...
July 29, 2009
2005 Ford F-150 XL 5.4L Misfire, MIL Lamp on, RUN RICK BANK1 VIN: 1FTPW125X4
P0172: rich bank1. GOOD MORNING FORD GUYS, I have a 05 f150 in our shop with a mil light on and code po172 rich b1. Have also noticed that at 1500rpm the engine will sit and shake like it has a engine miss. Long term will start at -9 and as soon as you acc will go to -17 and con...
July 30, 2009
2004 Honda Pilot EX 3.5L MIL Lamp on VIN: 2HKYF18744
P0172: Fuel System Too Rich (Bank 1). ... check engine light on. Had misfire codes (p0302,305,306) and fuel trim rich (p0172). Replace plugs for maint. Clear codes and road test to reset monitors. P0172 comes back on(no misfire codes, no misfire) after extended road test. Check for vaccum leaks, l...
July 11, 2009
1999 Dodge Ram 1500 Truck 3.9L Hesitation, MIL Lamp on, Loss of power/ VIN: 2B4HB15X9X
P0172: Fuel System Rich (Bank 1). ... runs rough at times. Boggs out after driving 10 min or so. Popps back through TBI for 30 sec or less and then takes off. Feels like it's bogging down during the backfiring. We replaced the cap and rotor, pre cat O2 sensor,CAT converter, and the coil. all w...
July 13, 2009
1996 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Misfire VIN: 2GCEK19R0T
P0172: Fuel Trim System Rich (Bank 1). about 2 months ago customer complaint was that the engine was misfiring. We could watch the misfire start on cylinders 5 and 7 then move to 1 and 3 as the vehicle warmed up. Fuel pressure and secondary ignition system are good. compression is good. We replaced...
July 15, 2009
2003 Dodge Ram 2500 Truck 5.7L No Start, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3D7KU28D03
P0172: Fuel System Rich (Bank 1). ... fit. I have 3 scanners, snap-on brick, cheap Auto X-Ray, and OTC Pegysis. Only the Pegysis will communicate (its a dodge). The code that it pulls is P0172 and says it LEAN B1. Im confused about that one. It also will not idle or start without pressig the g...
July 20, 2009
2001 Mercedes-Benz C240 2.6L Poor Idle Quality, MIL Lamp on VIN: WDBRF61J41
P0172: bank 1 rich. hello to all, this car has a rough idle hot or cold, in gear or park. the fuel pressure is 60 psi which is good. the ltft is 13.3 bank 1 and 11.7 bank 2. we smoked tested the engine for vacum leaks and there was smoke comming from the egr valave. if we opened...
July 22, 2009
1998 Dodge Neon High Line 2.0L Poor Idle Quality, Stall, MIL Lamp on, Low idle vacuum VIN: 1P3ES47C0W
P0172: Fuel System Rich (Bank 1). CS this problem started recently on a trip up north (from 1100 feet to 5500 feet). I suspected the timing belt had jumped a tooth or two. This was not the case. Timing marks line up perfectly. I have sprayed carb spray around the intake with no improvement in ...
July 23, 2009
1996 Lexus LS400 4.0L Hesitation VIN: JT8BH22F9T
P0172: Fuel System Too Rich (Bank 1). ... the customer and then the check engine light came on. P0172 Rich bank #1 They drove it for about three days and they said it ran great. Then one day it was having a hard time accelerating and also they thought it would stall. I have it and it ran fine to t...
July 28, 2009
2004 Cadillac SRX 4.6L MIL Lamp on VIN: 1JFGTYXMNC
P0172: Fuel Trim System Rich (Bank 1). ... that keeps coming back with P0172,P0175 codes.Acording to costomer tune up was done 20k miles ago with ac delco plugs. I replaced both upstream o2 with bosch with are same ones it had before. Replaced mass air flow sensor with OE part to no avail. This is ...
July 29, 2009
2005 Ford F-150 XL 5.4L Misfire, MIL Lamp on, RUN RICK BANK1 VIN: 1FTPW125X4
P0172: rich bank1. GOOD MORNING FORD GUYS, I have a 05 f150 in our shop with a mil light on and code po172 rich b1. Have also noticed that at 1500rpm the engine will sit and shake like it has a engine miss. Long term will start at -9 and as soon as you acc will go to -17 and con...
July 30, 2009