Definition:
Long Term Fuel Trim Multiplier System Too Lean
Description:
Engine speed less than 1000 rpm in closed loop, ECT sensor input more than 158ºF, MAF sensor input indicating less than 5.5 g/sec, EVAP purge not enabled, engine load less than 1.8 ms, and the PCM detected the Long Term fuel trim multiplier was more than
Cause:
- Air leaks after the MAF sensor, or in the EGR or PCV system
- Base engine “mechanical” fault affecting one or more cylinders
- Exhaust leaks located in front of the HO2S location
- Fuel control sensor is out of calibration (i. e. , ECT, IAT or MAP)
