Passat EPC and check engine light
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  1. #1
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    Passat EPC and check engine light

    2002 Passat V6 4motion
    I had the EPC and the check engine light come on while my car stalled and could not go over 10-15 mph. A preliminary check under the hood showed that the EVAP purge valve installed over the air filter canister was NOT clicking (like it should be). Could this have caused the incident?

    I could not take it to the autozone for a code read. I may have to just tow it to the dealer but wanted to do some basic troubleshooting first. Anyone have any similar expereinces or any ideas as to what the possible culprits maybe.

    Thanks
    Sarbhpreet

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  3. #2
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    Any issues with the Evap system should not cause an EPC light. You are just going to need to get codes somehow. Perhaps this would be an excellent time to invest in a code reader of your own... (If not a VAG-COM, at least a cheapie genereic reader.)

    SirWired

  4. #3
    the deal finder!
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    epc light means dbw issue.

  5. #4
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    Scanned for codes

    Ok I got a scanner from autozone and received the following code

    P0638 - Throttle actuator range/performance (Bank 1)

    Any thougts on this?

    Thanks
    Sarbhpreet

  6. #5
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    Search on the forums for "Throttle Body Adaptation". See if that clears it up. Also, a throttle body cleaning might help. This is a fairly easy DIY. Again, search the forum for details.

    SirWired

  7. #6
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    Dtc P0638

    I found this on the web while searching.

    http://www.myrotarycar.com/portal/fo...200600W05.html

    Sarbhpreet

  8. #7
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    Car at dealer

    The car went to the VW dealer. I got a call back today. They say that they received the code P1568 - Idle Speed Contr.Throttle Pos. mechanical Malfunction - and it needs a new throttle body ($750+labor) and after they install the throttle body it may even need an ECM. Is this correct that they cannot independently determine the condition of the ECM without having a working throttle body. That is what I was told. Also howcome when I checked with a OBDII I received P0638 and not P1568?

    Any thoughts/advice?

    Thanks
    Sarbhpreet

  9. #8
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    Check your warranty booklet. The ECM itself might be warranted to 80k under the emissions warranty.

    SirWired

  10. #9
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    DaMMMMMMM i hate the stealership.......... why do you need a whole TB?... not even a cleaning and code clearing would help?

  11. #10
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    I cleared the code but that wouldn't do anything. The stealership told me that the throttle actuator (installed on the TB) was not responding to any input. The car is back with only TB changed (not ECM thank god) and runnign fine. The car literally did not go over 10 mph or 1400 rpm, it was as they say in limp mode. Now it seems fine. (except for the oil leak onto the exhaust manifold on the passenger side that I spent $1200 on last year and never fixed).

    I love the way the car rides but at this rate it will bankrupt me. I think it is time to switch.

    This forum is great

    Sarbhpreet

  12. #11
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    how much was the TB fix? how much was the part

  13. #12
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    Tb

    TB was $740 and labor about $400

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