Error Code Question

Discussion in 'Technical' started by Subzer0, Mar 30, 2012.

  1. Subzer0

    Subzer0 Test Your Might!

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    Hi guys,

    Quick question. Will error codes return on 'ON' or does the engine have to be cranked?

    Not sure if code 34 fixed and can't start engine yet
     
    Subzer0, Mar 30, 2012
    #1
  2. ezzupturbo

    ezzupturbo JDMAutomotive

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    how are you checking your error codes?
     
    ezzupturbo, Mar 30, 2012
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  3. Chrispy

    Chrispy Pretentious Upstart

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    Depends on the error. Some will only come up after a period of running (like code 34 for me).
     
    Chrispy, Mar 30, 2012
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  4. a2zed

    a2zed Guest

    Code 34 will show up with just key on if it hasn't been fixed.
     
    a2zed, Mar 30, 2012
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  5. Chrispy

    Chrispy Pretentious Upstart

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    Not mine, takes a few minutes to come on.
     
    Chrispy, Mar 31, 2012
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  6. Subzer0

    Subzer0 Test Your Might!

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    Checking by putting the ECU in diagnostic mode and counting the flashes.

    Reset the ECU yesterday and came up 55, but can't start because Im waiting on my fuel filter and I have the PTU out. Also found it odd that there's no code 21 with the PTU unplugged..
     
    Subzer0, Mar 31, 2012
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  7. brisz

    brisz Well-Known Member

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    It may not see PTU fault till it trys to fire.

    Also it is not a definitive diagnostic tool, just a help, sometimes you will not get an error code, and "scanned" items can be the cause.
     
    brisz, Mar 31, 2012
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  8. Subzer0

    Subzer0 Test Your Might!

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    Ok, cheers :)

    Just got the S2 PTU wired in, gonna chuck the fuel filter in and see what happens
     
    Subzer0, Mar 31, 2012
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  9. pexzed

    pexzed Forum Administrator

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    That's because the ECU can't detect an ignition fault until it tries to fire the spark plugs.
     
    pexzed, Apr 1, 2012
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