P0171 Diagnostic Trouble Code Discussion for December 2018
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2007 Honda Civic Hybrid 1.3L MIL Lamp on, Lean p0171 VIN: JHMFA362X7 P0171: Fuel System Too Lean (Bank 1). ... setting a lean fault p0171- we found mass air flow meter out of range. Also found bank one sensor one lazy. Replaced and re checked- we still see the long and short term fuel trims go out of range while reving the engine- it occurs all across the rpm ... |
December 26, 2018 | |
| 2005 Ford F-150 FX4 5.4L Cuts out VIN: 1FTPX14555 The remaining problem is that fuel trim numbers are negative 25 at idle and up to positive 25 on accel and sets rich and lean codes. Seems to run good other than stumble right off idle sometimes.no misfires. All temp sensors seem to make good sense. Any id... |
December 27, 2018 |
