DTC B0077 Hummer
Long Term F T Multiplier Air System Low
Long Term F T Multiplier Air System Low
Description
Engine runtime 2 minutes in closed loop, and the PCM detected the Long Term Fuel Trim Multiplicative correction value indicated a rich A F ratio condition existed that was too rich to correct.
Cause and Solution
One or more injectors leakingFuel pressure regulator is leaking or fuel pressure is too highEVAP vapor recovery system has failed (canister full of fuel)A fuel control sensor is out of calibration (ECT, IAT or MAF)
Video Guide
Diagnostic Info
- DTC Code: B0077
- Brand: Hummer