C55_AZ

Alright guys, C55 is still busted.

Problems: ABS malfunction, ESP malfunction, brake pad wear, speedometer goes to zero, power steering gone, car goes into limp mode.

Tried: New ECU, New ABS module, new transmission, wheel speed sensors, new battery, and some other small things.

Resetting the battery gets rid of the issue for a couple minutes then all the messages come back. Problems only started happening after installing catless headers on the car.

Any help would be much appreciated

cs1c

Only other potential areas to look that I know of is the SAM modules or the wiring harness. Same set of codes and symptoms with mine which ended up being the ABS module.