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2011 CTS-V, REP only at WOT, P1516 code?
Hey guys. It's been a long time since I have been on the forum, but just recently I put together a customers 2011 Cadillac CTS-V Coupe with the modifications as follows.
LS9 cam
D3 Cadillac Heat Exchanger
Stainless Works Headers with 2" primaries and 3" collectors
High Flow cats
Lingenfelter 2.55" upper pulley
D3 9.0" lower pulley
Nitrous Outlet spray bar/lid spacer system
D3 Cadillac 4" Cold Air Intake
ID850 Injectors
Standalone C16 fuel system in the trunk.
Tonight was the first night I took it out of the shop for some street tuning. It's real rough, but I was trying to dial in WOT fueling with no nitrous. However, every time I'd stand on it it'd go into REP with a reported P1516 code and some other one about MAF out of self test range.
I disabled all the Airflow checks in the diag section, and maxxed out the airflow values to no avail. When the car rolled in it did not have this issue. But now that it makes about 14 psi every WOT hit REP pops up. Am I missing something here? Log and tune attached.