how ofter is it really the ECU/ECM

Asked by Jul 23, 2017 at 10:29 PM about the 2012 Toyota Yaris L

Question type: Maintenance & Repair

I have a 2012 toyota yaris. have a check engine light that has come on and
off several times over the last month and 1/2 but seem sto be on more than
not. The first time it came on it threw codes P0607, p0138 p1604 and
p1605. since then the only one to return after they have all gone off and
come back again is the p0607. I am sincerely hoping there could be another
culprit as it seems to go off when it's extremely hot out but then comes back
when it is room temperature or wet out. I know my battery has been tested
and has a below average unit of the cold crank amps (i think that what its
called?) and i was wondering how much that could have to do with it

2 Answers


Based on your description I wonder if it is bad electronics or a bad electrical connection. You may have a bad ECM.


the po607 means either bad ecu or bad connection to it

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