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Engine light only after full service

  • #1
    Registered Users Posts: 1,791 ✭✭✭ Rattlehead_ie

    Hi guys.

    Looking for quick advice. Diesel went in for major service. All well with car, no alerts etc. Head rocker gasket and bleeder pipe needed swapping, that's again ok these things happen and why the full service is always good. However within 12-24hrs of car being given back to me P0135 o2 sensor heater circuit error is coming up on car.

    I rarely believe in coincidence and would think this is something that's happened due to the work that was done? What's the likelihood of that? Car is Ford Focus