I've tuned many cars with DBW and have successfully disabled Reduced Power Mode on many vehicles via P0068, PO121, P2101 disabling. I've even disabled DTC 1516 as it was previously setting. This one has me stumped as its still enabling only at WOT or close but not only at high RPM. I can get this to fault going 45mph with lockup engaged and flooring it. On a select few vehicles I've had to go in and scale the tune down to lower the max VE values a few times to get this completely gone but on this vehicle I've tried to scale virtual VE by 75% yet it still enables quite easily.
Details: LS3 engine with mild cam, 4l60E trans, 08 Tahoe ECM, unknown TCM, pedal assembly from either Tahoe or vette (another shop did the build). It's a complete swap so there is no BCM just ECM/TCM. I was going to try to scale down 50% from where I'm at to give that a try but figured I'd throw it up here in case I'm missing something.
DTCs present (Even after disabling) are:
U0100 Loss comm with ECM/PCM A
U0121 Lost Comm with ABS
U0140 Loss comm with BCM
Attached tune is a virtual VE scaled by 75%
OL11b scaled.hpt
I've considered playing with the Engine->Airflow->Electronic Throttle->Desired Throttle Area sections but most have warnings that have me worried.
Anything stand out that I'm missing?