I have a 04 RX8. The car will start but will not get going over 30 mph. Engine light is on and giving a U0101 Communication error to TCM. Help what does this mean and how do I fix it?
Thanks, Brian

 

TCM, is that throttle control module?

Check the connector on the throttle body.

Auto or Manual. more data would help. If auto, could be transmission control module.

 

AT, right?


Try the 20 brake stomp reset.

 

Yes, it TCM Transmission Control Module. i tried the 20 Brake Stomp Reset. It did reset and the service engine light went off until i restarted the car a it came right back on. I have an automatic transmission.

 

check wiring, if wiring is Good, get a used TCM and have a dealer program it to your car

 

Yeah,

Start with reseating the connectors. Then wires, then you will likely need the module.