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unknown fault

  1. 42A0 "unknown fault" on Seat Leon FR TDi 150

    Hi all, I have had the engine management light come on and have taken it to my trusted independant garage. They have checked it and the code is 42A0 which comes up as unknown fault. :shrug: Can any body offer any advice? They cleared the fault for me, but 24hrs later it reappeared. The car...
    • TurboTay
    • Thread
    • 150 42a0 leon seat tdi unknown fault
    • Replies: 6
    • Forum: VAG-COM & Diagnostics
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