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2005 Focus 1.8Tdci Stopped And Wont Restart

aidmcn
aidmcn
in Ford Focus Club

Featured Replies

Hi i have a 2005 focus 1.8 tdci which has had an ongoing problem that manefests itself when driving along, the display reads reduced power, followed by power assist failure and ultimately when it stops the message is engine systems fault. At this stage the engine immobiliser light is flashing quickly and the car will not turn over or start.

To date the ford dealer has tried the following on the five occasions that it has been towed to the dealership.

Reprogramming Keys

Replacing the internal fuse box

Replacing the battery

Soldering some cables he states were loose behind the dash

and finally replacing the instrument cluster

Does anybody have any knowledge of a similar fault and how to resolve it?

  • Quote


    Sounds like to me something to do with the alarm/immobiliser.

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    hate to say it, if they have replaced those and its still happening its going to get expensive...im thinking new ecu maybe

  • Quote
    • Author

    Sounds like to me something to do with the alarm/immobiliser.

    I think the car displays and error code which is something to do with an intrustion attempt

  • Quote
    • Author

    hate to say it, if they have replaced those and its still happening its going to get expensive...im thinking new ecu maybe

    Its already cost £1100, the dealer will supply a warranty with the part butnot confirm that the underlying issue is resolved.

  • Quote

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    • The Digestive Forum Roundup (24th May - 31st May 2026)

      Steve ·
      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
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