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  1. #1
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    09 225 opti has low voltage fault code

    Getting a sensor supply voltage low B code #602-5 From what I have read the pcm is possibly faulty in sending out the 5v to the sensors. I have another pcm to swap but don't want to swap out if there is a possibility of sending another one to the trash pile. Any advice? Batt and wires good.

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
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    http://www.screamandfly.com/showthre...cs.&highlight=
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  2. #2
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    Can you put your pcm on another Opti and see if you get the code? Otherwise Simon/Brucato/Powers must test PCM's?

  3. #3
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    Yes, I can swap pcm's but am wary to do it thinking the engine may have a problem that could fry the second pcm too.

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  4. #4
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    Quote Originally Posted by XstreamVking View Post
    Yes, I can swap pcm's but am wary to do it thinking the engine may have a problem that could fry the second pcm too.
    Right... but if you put your PCM on a different Opti; that wouldn't be a problem.

  5. #5
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    You are right... I might give it a try. Thanks for the guidance....

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  6. #6
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    What's the procedure to check voltage going to the sensors? Google was no help.....

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  7. #7
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    Is this your motor? https://www.google.com/url?sa=t&sour...512YsKi8Ixd7jO

    Looks like maybe not, sorry.
    Last edited by David - WI; 07-23-2020 at 12:04 AM.

  8. Thanks XstreamVking thanked for this post
  9. #8
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    Mines a down draft...Ser. no 1B780484 09 225 opti. I may just bite the bullet and take it to the dealer to be scanned. Lot of variables. Could be a sensor, or computer, or I dunno....Had a long beep and went into guardian mode when trying to 1st plane it out. Shut it off, re-started it and ran all day with no issues or beeps. I have a merc monitor that reads on my phone and gave the code and problem.

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  10. #9
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    I sleuthed it down to the trim sensor being the culprit. Pulled it and all's well. Did the trick of swapping the pcm and found it to be good. Darn opti's are the strangest engines....

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  11. Likes dgscroggs, David - WI liked this post

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