Redused power mode out of nowhere

[Xlexustech]

Ive read several threads here and else where about LS swaps going into Limp Mode with a some variant of these P2135, P0121, P2101, P0220 DTC?s
Can someone explain how these tables work and how to tune them ?

Also I found a change where this table (pictured below was 100 for all records. I found an old file that i know worked and pulled in these changes in the image below. My hope is that the 100 in all the cells was putting the ECU into WTF mode and shutting down (Power reduction mode). Feedback on that really appreciated.

When I clear codes cars is back to normal BTW, Issue is intermittent but scary when it happens depending on where I am..

Attachment 162561

[edcmat-l1]

Sure does get old having to say "post a tune and data log" day after day after day.

You've been a member for 5 years you gotta know how it goes around here by now.

Most LS swaps going into REP are caused by throttle pedal/OS mismatches or people screwing with the ETC tables.

[gtstorey]

Sure does get old having to say "post a tune and data log" day after day after day.

You've been a member for 5 years you gotta know how it goes around here by now.

Most LS swaps going into REP are caused by throttle pedal/OS mismatches or people screwing with the ETC tables.

Just consider it part of his "free apprenticeship".
https://forum.hptuners.com/showthrea...iceship-offeed

[Xlexustech]

Just consider it part of his "free apprenticeship".
https://forum.hptuners.com/showthrea...iceship-offeed

Sorry..
Please find attached relevant tunes and Files. Files on the 16th show issue files on the 17th do not.
Log has Mark line in it shortly after issue occurrence.
I reverted to a known good file this morning, drove for 45 mins with no reoccurance. I could just move on , but hoenstly want to learn from this.


7-16-25-MAF-Only-002.hpl7-17-25-Rebase-02.hpl67camaro LS3-BASE-Manual updates-003.hptRebaseline-7-17-25-PSI-File-003.hpt

[Xlexustech]

Sure does get old having to say "post a tune and data log" day after day after day.

You've been a member for 5 years you gotta know how it goes around here by now.

Most LS swaps going into REP are caused by throttle pedal/OS mismatches or people screwing with the ETC tables.

looks like i set all the ETC tables under Tip In to 6042. I may have done this accidentally instead of updating the torque limit tables to the max boundary.

Would that do it ?.

[Xlexustech]

Bump .. Files atttached above

[2xLS1]

looks like i set all the ETC tables under Tip In to 6042. I may have done this accidentally instead of updating the torque limit tables to the max boundary.

Would that do it ?.

No. Tables are ignored with the master switches set to disable.

[2xLS1]

Did you modify your Desired Throttle Area tables. I have 2 other 09 Vette Z06 files and your tables are different than those. The segment numbers in my files are slightly different than yours though.

[Xlexustech]

not sure, i was getting help on this forum for idle issue. They may have changed during that round of edits.. I/ll go back through some history of change and see what I can find