P0172 Diagnostic Trouble Code Discussion for August 2015
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2001 Ford Taurus SES 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FAFP55U61 P0172: system too rich bank 1 sensor 1. Hello all, 2001 Taurus with a rich running cond. Warm and idleing in the bay now and black smoke is rolling out of the tailpipe. Injector pulse at 4.9 to 5.1( both banks) at idle,front o2s are 907 and 798,open loop after running for a hour. Can get o2s to drop... |
August 11, 2015 | |
| 2008 Volvo C30 2.4i 2.4L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: YV1MK38288 P0172: System too rich. Vehicle came in with 3 codes listed above. Diagnosis lead to replacing fuel pump and fuel pump module. Problem still occured post installing fuel pump and module. Spark plugs are always being fouled, causing misfires. Fuel trim values are -27, Air flow is ... |
August 11, 2015 | |
| 2007 Nissan Maxima SL 3.5L Excessive Emissions, MIL Lamp on VIN: 1N4BA41E37 P0172: Fuel Trim Rich (Bank 1). Cleaned throttle body, the fuel Alpha is 70 when cruising medium speed like 45 and RPM around 1500. The trims seem to get better when heavier acceleration and cruising. The Freeze frame states the code set after steady 60 mph cruise and then realease the throt... |
August 17, 2015 | |
| 2004 Mercedes-Benz C230 Kompressor 1.8L Excessive Emissions VIN: WDBRF40J04 P0172: Rich Bank 1. To all Techs, This C230 has a code P0172 (rich, B1). The exhaust reading confirmed a rich mixture with a reading of 3% CO at idle and cruise. I back probe the Air Fuel Ratio Sensor Pump wire (red) and notice 2.1 volt under low, medium and heavy load condition.... |
August 26, 2015 |
