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  1. #1

    Join Date
    Jul 2012
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    Honda F1 code #25

    Would someone give advice!

    I have pulled up code 25 bad knock sensor, I have replaced the knock sensor with a new one, I water tested it again went into limp mode, and code 25 came up once again. Do I need to do a reset now that I have new knock sensor installed?


  2. #2
    energysolutions's Avatar
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    Jun 2007
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    Northern Ireland
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    Unfortunately if the knock sensor don't cure it then the next step is to replace the ECM - major $$$$$

    Probably clutching at straws but it would be worth checking the loom (tells you how to and what values to expect in the manual) and checking the ECM pins and connector for signs of corrosion but I would be bracing your wallet for a hit

    Good luck.....

  3. #3
    hey energy... what is the loom lol?

  4. #4
    energysolutions's Avatar
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    Wiring loom......

  5. #5

    Join Date
    Jul 2012
    Location
    Ontario
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    Thanks,

    I reset the code ran well for 6-8 miles. After it sat i ran it again and once it hit 3000 rpm's i got the same code. Tried to reset again and this time the relay started to hum and would not quit until i disconnected the main fuse. Looks like i need a new relay because it does not start now. has anyone had this occurance?

  6. #6
    JRINJAX's Avatar
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    Oct 2007
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    Jax, Florida
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    The main relays have close to a 100% failure rate. The replacements are better.

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