Figuring out If the ECU / DME has failed and what faults are present is step one in replacing or repairing your damaged . The most simple checks to find out When your ECU / DME has failed are: OBD fault codes - Most diagnostic scanners can browse fault codes https://bmwecurepaircost96295.blogcudinti.com/29950765/the-definitive-guide-to-ford-ecu