P0171 Diagnostic Trouble Code Discussion for April 2022
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2000 Honda S2000 2.0L MIL Lamp on VIN: JHMAP1141Y P0171: Fuel System Lean. Are there any common issues causing this code? Engine idles smoothly, but trims become high at idle. |
April 20, 2022 | |
| 2003 Land Rover Discovery SE 4.6L Excessive Emissions, Poor Idle Quality VIN: SALTW16413 P0171: bank a lean. smoke tested intake,small leak at #4 injector.Short term fuel trims are buried lean on both banks.Substituted MAF.Front o2 sensors reading.02 @ idle with no fluctuation.If you reset adaptions,stft drops to .99 but in 10 seconds back up to 1.24 @ idle on bo... |
April 25, 2022 |
