P128E GMC - Fuel Rail Pressure Performance
- Faulty Fuel Rail Pressure Sensor
- Fuel Rail Pressure Sensor harness is open or shorted
- Fuel Rail Pressure Sensor circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P128e Gmc DescriptionDuring certain engine operating conditions the Engine Control Module (ECM) checks the actual fuel rail pressure reported from the fuel rail pressure sensor and compares the value to a set programed value. If the values are out of the calibrated range for a set amount of time DTC P128E will set.
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