As some of you know, throwing on some drag radials without TPMS sensors will eventually cause the car to light up the TPMS malfunction indicator lamp (after about 20 miles of driving) and then completely lock you out of PTM modes and launch control. Additionally, you will not be able to hold down the traction control button to turn everything off (both TC and Stabilitrak). Thankfully, the engineers kept us drag racers in mind and threw in an undocumented mode for us to use in this scenario.
To re-enable PTM modes and launch control AFTER your TPMS MIL is on:
1. With the engine running and the car in park, engage the electronic parking brake.
2. Press your traction control button 6 times (if you do it too fast or too slow it won't work).
3. Once the messages in your dash catch up to the 6 button presses, then hold down the traction control button for around 5 seconds.
Result: You'll see both the TC and Stabilitrak lights come on and you can now enter PTM modes, use launch control, or turn everything off.
While your TPMS MIL is active, you'll need to perform this procedure every ignition cycle.
I had some fun testing this on street today once I finally got around to throwing on the welds from my V2. They were color matched for the V3 and fit perfectly. I'm currently running 295/45R17 MT ET Street IIs on them. They are pretty close to the stock overall diameter (27.1 vs 26 inch) and don't seem to cause any weird traction/computer issues (tested numerous times up to 140ish). I think they fill the gaps perfectly.... not a bad looking setup for when I take it to the track....
To re-enable PTM modes and launch control AFTER your TPMS MIL is on:
1. With the engine running and the car in park, engage the electronic parking brake.
2. Press your traction control button 6 times (if you do it too fast or too slow it won't work).
3. Once the messages in your dash catch up to the 6 button presses, then hold down the traction control button for around 5 seconds.
Result: You'll see both the TC and Stabilitrak lights come on and you can now enter PTM modes, use launch control, or turn everything off.
While your TPMS MIL is active, you'll need to perform this procedure every ignition cycle.
I had some fun testing this on street today once I finally got around to throwing on the welds from my V2. They were color matched for the V3 and fit perfectly. I'm currently running 295/45R17 MT ET Street IIs on them. They are pretty close to the stock overall diameter (27.1 vs 26 inch) and don't seem to cause any weird traction/computer issues (tested numerous times up to 140ish). I think they fill the gaps perfectly.... not a bad looking setup for when I take it to the track....