I am just starting to tune a 2005 CTS-V with an LS6 engine in it.
Modification are a K&N CAI, 1 7/8" long tube headers and a full cat back exhaust.
I am equipped with a wideband on this particular car and I have all my %AFR Error via the wideband set up and was going to start tuning the VE tables.
After I flash the ECM, usually the 2nd or 3rd key cycle the ECM will set a P0068 and a reduced engine power message. Car runs like crap obviously and I dont get anywhere.
I have tried to disable the P0068 diagnostic code to report no SES light but that doesnt seem to work.
If I reflash the ECM with the stock calibration, code doesnt show up and I have no issues other than being unable to tune the VE tables.
Is there something I am completely missing?