2009 Corolla 110,000 miles 1.8 5spd. I got a U0100 code showing up on my Bluedriver app. No check engine light. From your experience will this most likely end up with a new ECM?
Clarification: is the vehicle starting up and running fine? And no other codes are present?
Car runs fine. MPG is right around 38 on the highway where it's always been. I had a check engine light on for a few hours but it went out on its own. I was going to replace the coil for the #3 cylinder because of the P0353. I have noticed a few times in the past few months I got a stumble after I put the car in neutral coasting to a stop sign.
Is there a history of ECM failures on Toyota?
History of ECU or PCM failures with Toyota? - no, not really. The probability is not 0% either but it’s uncommon. Check those links and rule out something simple like wires/connections/also reset the code and see if it ever comes back (maybe it’s intermittent or one time thing).
It can be, but try the following below first:
https://www.justanswer.com/toyota/eco44-toyota-corolla-2005-code-u0100-toyota-corolla-2005-code.html
https://www.obd-codes.com/u0100
https://repairpal.com/obd-ii-code-u0100-lost-communication-with-ecm-pcm-a
Excellent I'll give these a look over with the DMM and check the wiring.