P0172 Diagnostic Trouble Code Discussion for June 2021
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2001 Chrysler Town & Country Limited 3.8L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 2C8GP64L41 P0172: Fuel System Rich (Bank 1). Reset fuel trims and STFT was instantly negative with O2 voltage stuck high above 800mv until LTFT goes negative, then O2 switches normally. LTFT goes to -25. Checked fuel pressure at 59 psi and holds. Checked purge valve not leaking and no change in fuel ... |
June 19, 2021 |
