As our cars are getting older and I was victim of this exact issue on my ST205 3SGTE in the Alltrac and it absolutely drove me nuts. I stumbled upon my issue by exhaustive troubleshooting then ended up finding the information after the fact. So, I thought I would at least put a link to the MR2OC's article on the subject since its a good writeup. If your car is acting stupid or throwing weird codes for no reason when everything checks out, this may be your issue. https://www.mr2oc.com/threads/ecu-capacitor-replacement-how-to-guide.559625/
