Wife's car. 86,000 mi. Got a U0400 code after check engine light came on after trying to start it. It started, stalled and this code came up. Restarted ok afterwards.


Any insight? I cant find anything on U0400.


Thanks

 

its a generic invalid data received code. Did you clear the code and see if it returned? Was there any issue with the doors being locked unlocked by the FOB or other odd events?