Limp Stillen Supercharger dtc p1239

Z4fun

Hey guys , after some testing and research we concluded the cause is 100% heat. since the wire is being heated its increasing the resistance causing and interruption in the signal throwing the tb off and causing it to go into limp mode.

My mechanic said he tested the wire cold then warmed up the car and tested again and saw a dramatic rise of resistance in the cable. The two options we had is to insulate with a sleeve or try to reroute the wire. Since I am adding a vented hood, we decided to go with the sleeve. (attached pic)


In doing more research this is actually a well known fact in thermal electrical engineering here is the definition for Heat resistance.

Heat Resistance

Heating a metal conductor makes it more difficult for electricity to flow through it.

In metal conductors, electrical current flows due to the exchange of electrons between atoms. As electrons move through a metal conductor, some collide with atoms, other electrons or impurities. These collisions cause resistance and generate heat. Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance.

https://nationalmaglab.org/education...eat-resistance

Attached Images

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