P0172 Diagnostic Trouble Code Discussion for November 2021
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2016 Ford Fusion SE 1.5L MIL Lamp on VIN: 1FA6P0HD1G P0172: Bank one system rich. ... Customer complaint was the CEL was on. Tech pulled a P0172 - bank one system rich. I had him monitor the fuel trims. He states they are short & long term are at negative 25 at idle. Under mild acceleration they go to around 2.3. At cruise there bet... |
November 01, 2021 | |
| 1996 Ford Bronco Eddie Bauer 5.8L Excessive Emissions, Stall VIN: 1FMEU15H8T P0172: system to rich bank 1. This one is kicking my butt. Customer states check engine light comes on and sometimes turns off. Connected the scan tool and found LTFT both banks at -25%. STFT were hovering around 0, +/- 5. I checked fuel pressure and found it was good at about 32-38psi... |
November 15, 2021 | |
| 2008 Chevrolet Silverado 1500 WT 4.3L Poor Idle Quality, Stall VIN: 1GCEC14X48 P0172: Rich bank 1. Have this truck that both st fuel trims reach -15 to -20 at idle. Cleaned t-body, ck fuel press(ok), replaced maf old maf pids looked good. On cold start is hard to start but will start up with slight throttle applied. Iat pids bounce from -4 to actual tem... |
November 24, 2021 |
