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Thread: P0606 ecu failure code

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  1. #1
    Junior Member
    Join Date
    Mar 2013
    Bowling green ky
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    P0606 ecu failure code

    Hey guys so I'm having some trouble. My car is throwing an ecu failure code. Talked to Hondata and they said corrupt file so I reset to factory tune and than to current tune. Still does it. 1-3 gears my car rev limits @ 8500, however, in 4th, it doesn't rev limit and goes to 9k+ and throw the ecu cel and puts my car in limp mode. Turn my car off while coasting and back on and it's fine but cel stays on for a day or two. Any ideas? A buddy of mine said his friend had the same problem in a Mazdaspeed6 and it was a speed sensor. Also thinking maybe a crank or cam sensor? Need help

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  4. #2
    Master Member
    Join Date
    Dec 2011
    Feedback Score
    1 (100%)
    I don't know for sure what it is, but I think it could be a speed sensor, although I think that would affect all gears. I have a BNIB speed sensor if you want to try swapping it out, I'd be willing to sell it.

  5. #3
    Join Date
    Dec 2012
    Feedback Score
    Doubt it's the speed sensor. Could be the crank pulse plate, or just a bad ECU.


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