2017 M7 Zo6 - Codes U0126 AND P0106 FEEDBACK PLEASE

[N/A Zo6]

I just bought a 2017 M7 Zo6 with 1900 miles on it and has the following mods: AFE intake, 18% OD bottom pulley, kooks headers with no cats and a Tune. On a 200 miles drive I got on t the car hard (1) time up to about 130 mph and the check engine light came on and went into reduced power mode. I pulled the (2) codes when I got home (U0126_Communication with steering sensor and P0106_MAP sensor range).
The tune seemed to address the typical P0101,P0126,P0121 codes by having 492 F in for Min ECT and 493 F for Max ECT. I believe there was a bulletin out for the 2017 cars to correct this however my car is tuned and lightly modded so the dealer is likely to be of no help. The U0126 is a communication loss with steering angle sensor. See attached current tune if anyone could help would be much appreciated

[TriPinTaZ]

The U0126 code is common after an ECU flash. If you clear it then it will not come back unless you reflash it again. So I wouldn't worry about that code.

Are you sure the tune you have attached is the one that is actually in the car right now? The attached file has the correct settings to address the P0106. What KPA (PSI) are you hitting up top? I see the max KPA is 190 in a couple parts of the tune which is about 13 PSI. I think an 18% OD would exceed 13 psi.

Torque Management > Supercharger > Max Pressure is set to 190. Maybe raise this to 200.

[N/A Zo6]

The U0126 code is common after an ECU flash. If you clear it then it will not come back unless you reflash it again. So I wouldn't worry about that code.

Are you sure the tune you have attached is the one that is actually in the car right now? The attached file has the correct settings to address the P0106. What KPA (PSI) are you hitting up top? I see the max KPA is 190 in a couple parts of the tune which is about 13 PSI. I think an 18% OD would exceed 13 psi.

Torque Management > Supercharger > Max Pressure is set to 190. Maybe raise this to 200.

I was wondering about that but don't know the correlations since 190Kpa equals 27.5psi so I figured is was plenty over the 13-14psi boost capability of the supercharger.

[TriPinTaZ]

I was wondering about that but don't know the correlations since 190Kpa equals 27.5psi so I figured is was plenty over the 13-14psi boost capability of the supercharger.

Yes but you have to consider that atmosphere is approx 14.5PSI (100KPA) depending on where you live. So the way it works in the ECU, 190KPA is allowing 90KPA over the 100KPA of atmosphere. So in reality this means the boost limit would be 190KPA-100KPA Atmosphere = 90 KPA or ~13psi.

If you're pullies are mechanically set to reach 15PSI then you should set Max pressure to 205KPA which is about 15.2PSI of positive manifold pressure. I typically set this value anywhere between 250 and 300KPA just as one of those little hidden flags in a tune so that I can see if any of my tunes make it back onto the internet somewhere. But in reality 205-210 is usually high enough for most stock blowers with a pulley.

[N/A Zo6]

Yes but you have to consider that atmosphere is approx 14.5PSI (100KPA) depending on where you live. So the way it works in the ECU, 190KPA is allowing 90KPA over the 100KPA of atmosphere. So in reality this means the boost limit would be 190KPA-100KPA Atmosphere = 90 KPA or ~13psi.

If you're pullies are mechanically set to reach 15PSI then you should set Max pressure to 205KPA which is about 15.2PSI of positive manifold pressure. I typically set this value anywhere between 250 and 300KPA just as one of those little hidden flags in a tune so that I can see if any of my tunes make it back onto the internet somewhere. But in reality 205-210 is usually high enough for most stock blowers with a pulley.

Got it; I changed it from 190KPA to 205Kpa so I should be good to 15psi. Thank you for the feedback!!