**** Another CEL question ****
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This is a discussion on **** Another CEL question **** within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Already searched GOOGLE and other forums with no luck. Codes thrown: P0102 MAF circuit (low input) P0113 IAT sensor circuit ...

  1. #1
    Registered User just Touge's Avatar
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    **** Another CEL question ****

    Already searched GOOGLE and other forums with no luck.

    Codes thrown:
    P0102 MAF circuit (low input)
    P0113 IAT sensor circuit
    malf. (high input)
    P0171 System too lean (Bank 1)

    Troubleshooting done:
    Gas cap is tight
    MAF cleaned
    MAF replaced (ran fine for 2 days then codes returned)
    Visual inspection of vaccum/intake lines (top side)

    Is there any vaccum lines on the underside for me to check? I've already done a quick inspection up top and not found anything, the codes all suggest an air issue but I can't seem to find any leaks. Any common areas that I should check. Thanks in advance.
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  3. #2
    Moderator Donkey's Avatar
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    List your mods. Sounds like you have an aftermarket intake causing problems.
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  4. #3
    The Default One SeattleJeremy's Avatar
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    *** Former Civic owner ***

    Does the car have an aftermarket intake?

    Maybe it's tuned for an intake, but the previous owner took it off, installed the stock air box, and didn't change the ECU settings?

  5. #4
    Registered User just Touge's Avatar
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    Quote Originally Posted by Donkey View Post
    List your mods. Sounds like you have an aftermarket intake causing problems.
    Nope, stock.

    Quote Originally Posted by jeremy96gase View Post
    Here's his mod list.
    *** Former Civic owner ***

    Does the car have an aftermarket intake?

    Maybe it's tuned for an intake, but the previous owner took it off, installed the stock air box, and didn't change the ECU settings?
    Always been stock airbox. Motor has never been touched.
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  6. #5
    He simply abides. SD_GR's Avatar
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    Check that the stock airbox contains a clean and correct filter. Check that the cover for the airbox is seated correctly. On the bottom just over the fuel rail on the same side as the airbox but low, there is a fuel pressure regulator that needs a vacuum line attached to it for reference. Check that line.
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  7. #6
    Registered User just Touge's Avatar
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    Quote Originally Posted by SD_GR View Post
    Check that the stock airbox contains a clean and correct filter. Check that the cover for the airbox is seated correctly. On the bottom just over the fuel rail on the same side as the airbox but low, there is a fuel pressure regulator that needs a vacuum line attached to it for reference. Check that line.
    will do, thanks.
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