× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0172 Diagnostic Trouble Code Discussion for April 2006

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
1999 Ford E-250 Econoline 4.2L Excessive Emissions, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTNE2420X
P0172: system rich. this vehicle came to us after the customer had another shop perform a tune up. He then was told he most likely had a dirty injector. I have heard a lot of people having head gasket problem with this engine but this engine has no signs of coolant leakage,no hyd...
April 19, 2006
2003 Pontiac Grand Am SE 3.4L Surge, MIL Lamp on VIN: 1G2NF52E83
P0172: Fuel Trim System Rich. ... pretty standard code--P0172, system rich. Here is the freeze frame: Calc. load--16.0 ECT--192 STFT--3.1 LTFT--(-)24.2 MAP--20 in/hg rpm--1764 airflow--23.77 grams/sec TPS--8.2 Current data shows rich at idle and 2500 rpm. MAP sensor appears to be reading ...
April 19, 2006
1999 Ford Ranger XL 3.0L Poor Idle Quality VIN: 1FTYR14V7X
P0172: lean bank 2 pending. ... intermittent hesitation while driving. found code p0171 lean bank 1 (hard) and p0172 lean bank 2 (pending). codes return after a few weeks. 02 sensor waveforms look ok (bank 1 looks a little slower). MAF waveform looks good. Plugs and wires are good. Found...
April 25, 2006
2003 GMC Envoy SLT 4.2L Poor Fuel Economy, MIL Lamp on VIN: 1GKDS13S93
P0172: Fuel System Rich (Bank 1). ... codes P1523 Throttle Plate Position, and P0172 System runs rich bank 1. Hooked-up fuel pressure gauge found pressure to be 55psi, spec call for 54psi. Fuel pressure regulator has no vacuum to it. Is this normal. I did try to hook up a vacuum hand pump and ...
April 26, 2006
1998 Ford Ranger Splash 4.0L MIL Lamp on VIN: 1FTZR15X2W
P0172: rich bank 1. this ranger runs ok but keeps setting the rich codes.i have replaced the maf and fuel pressure reg with no change.have plugged evap purge checked air intake for restriction its ok.fuel pressure will drop 20lbs in 10 minutes.any suggestions will be appreciated....
April 27, 2006