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Thread: Audi A4 1.8T, engine code BEX trouble codes

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  1. Audi A4 1.8T, engine code BEX trouble codes 
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    Hi, looking for some guidance/help with some trouble codes that i have on my Audi A4. I have an EML light and traction control lights on the dash, so scanned error codes with VCDS (see attached) all of the faults are related to "short to ground", which makes me think that there might be a wiring issue (just a guess really).

    I had a visual check and all seems OK, but seeking some guidance in case there is a common issue somewhere in the wiring or one of the component that could fail and cause these faults?

    Any help is much appreciated!


    Log-AUDI A4.txt
     
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  2. Re: Audi A4 1.8T, engine code BEX trouble codes 
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    They are all powered by fuse 34 in the dash side fuse board which comes out as a green/yellow wire going up to pi 8 of the brown 10 pin connector in the plenum chamber ECU box where there is a multiple connection point which could be corroded or obviously fuse 34 could have been blown by one of the components it power which are

    G70 Air Mass Meter
    N112 Secondary Air Inlet valve
    N80 EVAP
    N249 Boost re-circulation solenoid
    J299 Secondary Air pump relay
    Z29 Post cat lambda heater circuit
    Z19 Pre cat lambda heater circuity

    The diagram hints at another take off just after the fuse board but does not elaborate.
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