P0171 Diagnostic Trouble Code Discussion for July 2025
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2018 Jeep Grand Cherokee Limited 3.6L MIL Lamp on VIN: 1C4RJFBG2J P0171: Fuel system lean b1. ... code p0171 and p0300 check for vacuum leaks none found,inspect plugs found worn out so replaced also installed 3 coils for b1 ,after getting to close loop lft went +23% only b1 runs kinda rough but no misfires ,off idle runs fine with plenty of power ... |
July 24, 2025 |
