Diagnostic Aids
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
- A leak in the high pressure fuel system may set a DTC.
- A faulty valve, plunger, or solenoid in the high pressure fuel pump may set a DTC. High pressure fuel pump damage will most likely be undetectable upon visual inspection.
- A restricted fuel feed pipe between the high pressure fuel pump and the fuel rail fuel pressure sensor may set a DTC.
- Any problem with the bank 2 exhaust cam may set fuel pressure DTCs due to the location and design of the high pressure fuel pump. If DTC P0019 or P0391 are current or in history, a cam control issue may be the root cause.
- A leaking or restricted fuel injector may set DTC P0089.
- For DTC P00C6, park the vehicle outdoors overnight and perform a start in the morning.
- A short to voltage in the crankshaft position signal circuit may set a DTC.
- As little as 2 Ω on either circuit of the High Pressure Fuel Pump actuator will cause these DTCs to set. Test the circuits of the High Pressure Fuel Pump actuator for a high resistance if you suspect a condition.