*Important Note-Before starting the diagnosis process, verify that the ECM calibration is up to date. An outdated ECM calibration can lead to issues with sensors and modules.
1. Troubleshoot any code in the 200, 300, 400, 500, 1100, 1900, 2300, 3700, 4600, 4700, 5585 range.
2. Make sure fuel tank has sufficient fuel.
3. Inspect all fuel lines for leaks or damage. Make sure no lines a pinched. Repair any leaks or kinks found
4. Check for air in the fuel system.
5. Check for restriction at fuel inlet and fuel filter.
6. Inspect Low-Pressure and High-Pressure system including injector return flow and pressure relief valve.
TROUBLESHOOTING SHACK 