ddec iv ecm not working

Oct 22, 2014 #11

I have heard about the internal battery but dont they slowly go bad over time not at once?

glens, Oct 22, 2014

#11

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Oct 22, 2014 #12

Usually. I had my ecu read 2 years ago when I bought mine and it Said low battery life then..... still plugging along

dustinbrock, Oct 22, 2014

#12