Duramax Lifetime Supporter
Join Date: Dec 2016
Location: Central CA
I found this write up on the other diesel forum:
DTC P01CC, P01CE, P01D0, P01D2, P01D4, P01D6, P01D8, P01DA, P01CB, P01CD, P01CF, P01D1, P01D3, P01D5, P01D7, or P01D9
Cylinder 1 Injection Timing Advanced
Cylinder 2 Injection Timing Advanced
Cylinder 3 Injection Timing Advanced
Cylinder 4 Injection Timing Advanced
Cylinder 5 Injection Timing Advanced
Cylinder 6 Injection Timing Advanced
Cylinder 7 Injection Timing Advanced
Cylinder 8 Injection Timing Advanced
Cylinder 1 Injection Timing Retarded
The engine control module (ECM) has the ability to learn injector timing performance. With the engine at operating temperature and in closed throttle decel mode, the ECM will pulse each injector individually and measure the changes in rotational speed of the crankshaft using the input from the crankshaft position sensor (CPS). The ECM will run this diagnostic at one fuel rail pressure operating point for each injector. The ECM stores the injector timing value.
That's description of the codes
Here's the diagnoses
Verify the proper fuel is used. Refer to Fuel System Specifications and Contaminants-in-Fuel Diagnosis.
Verify there are no aftermarket performance enhancing devices installed on the vehicle.
Perform the Fuel Injector Correction Reset for the appropriate fuel injector. Refer to Fuel Injector Correction Reset.
Perform the Crankshaft Position Reluctor Wheel Learn. Refer to Crankshaft Position Reluctor Wheel Learn.
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not set. Refer to Fuel Injector Timing Learn.
If a DTC is set
Refer to Circuit/System Testing.
If a DTC is not set
6. All ok
Perform a engine compression test. Refer to Engine Compression Test.
If engine compression is not within specification
Repair as necessary.
If engine compression is within specification
Replace the appropriate Q17 fuel injector.
I wonder if GM considers the Edge CTS2 as simply a monitor to be a "...performance enhancing devices."? I already have another email into Edge tech support because of the issue with the CTS2 blocking the diagnostics from OnStar. I asked that they check with their engineers to see if the CTS2 would also interfere with the ECM performing the injector timing diagnostics.
Anyone else been down this road before?
'17 3500HD LT 4WD RC LB DRW, Edge CTS2