Join Now
International Automotive Technicians Network

P0172 Diagnostic Trouble Code Discussion for October 2014

Fuel System Rich (Bank 1)


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0172
Help Request Posted
1997 Honda Civic DX 1.6L MIL Lamp on VIN: 1HGEJ6225V
P0172: Fuel System Too Rich. Hello all, hope everyone enjoyed their summer! Can't believe it's October already!! This one has us scratching our heads. The vehicle is running rich, PCM is pulling about 30% fuel (LTFT stays around negative 14-18%, STFT stays about the same). We do not have...
October 02, 2014
2006 Chevrolet Trailblazer SS 6.0L No Start, Cuts out VIN: 1GNES13H66
P0172: Fuel System Rich (Bank 1). Ok i have a doozie here. Vehicle runs great for about 30 minutes and then just all of a sudden dies out. Sometimes it just takes about 30 minutes or so to start back up but yesterday afternoon it took over a hour due to it being hot outside. I replaced the cra...
October 07, 2014
1997 Honda Civic DX 1.6L MIL Lamp on VIN: 1HGEJ6225V
P0172: Fuel System Too Rich. Hello all, hope everyone enjoyed their summer! Can't believe it's October already!! This one has us scratching our heads. The vehicle is running rich, PCM is pulling about 30% fuel (LTFT stays around negative 14-18%, STFT stays about the same). We do not have...
October 07, 2014
2011 Chevrolet HHR LS 2.2L MIL Lamp on VIN: 3GNBAAFW0B
P0172: rich code. rich code p0172 comes back after two drive cycles.
October 21, 2014
2005 Chrysler Pacifica Touring 3.5L Surge, MIL Lamp on VIN: 2C4GM68445
P0172: Fuel System Rich (Bank 1). ... Thanks in advance for your replies. This van came in running rough. Customer bought this van at auction and took to dealer for diagnosis. They told him upstream O2 sensor needed to be replaced. Scanned O2s and saw the upstream O2 was not toggling as it sho...
October 24, 2014
2006 Pontiac Montana SV6 3.9L Excessive Emissions VIN: M27D174476
P0172: Fuel System Rich (Bank 1). Good morning everyone. I have a 2007 Montana sv6 that keeps setting a rich exhaust code. I've been chasing this problem off and on for a few weeks. Customer hasn't been able to leave it. After flushing injectors, reprogramming ecm I thought I had the block lea...
October 27, 2014
1999 Chevrolet K2500 Suburban 7.4L MIL Lamp on VIN: 3GNGK26JXX
P0172: Fuel Trim System Rich (Bank 1). This one has me stumped. What's going on with this vehicle is its over calculating with it's MAF sensor. AT idle, the total fuel trims are -10 on bank 1 and -12 on bank 2. Under a load, they're -25 to -30. If I unplug the MAF sensor and reset the fuel trims, t...
October 31, 2014