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Focus st tdci glow plug circuit error

jrie
jrie
in Ford Focus Club

Featured Replies

Hi! 

Sorry my english, I'm from Finland...

 

My 2016 Ford focus st tdci won't start. Couple days ago car work fine and I drove it my parking place. Today it won't start. 

 

When I put ignition on, electronic works ok, but service now -message comes. If I start, starter don't do anything. Only clicking sound comes from engine. I check codes, and it says all 4 cylinders "glow plug control circuit high" (p067b, p066f, p066d and p066b). 

 

Where should I start checking? Is there control unit to Glow plugs somewhere? Whit searching and google didn't help me...

Thank you all. 

 

 

  • Quote


    On 7/19/2025 at 10:47 AM, jrie said:

    Where should I start checking? Is there control unit to Glow plugs somewhere?

    The glow plugs are controlled by the Powertrain Control Module (PCM), there is no separate module for the glow plugs.

    Check for loose, damaged, corroded connector to the PCM.

  • Quote
    • Author

    Thanks for tips. 

     

    When I checked the wires, I found control unit (9802424080)in front of the pcm-box, under headlight. I change that unit and now car start and no errors! 61LzfBIOWeL._UF8941000_QL80_.thumb.jpg.4ec5083db89ab9f490c308893a2bfa27.jpg

  • Quote
    • Like 1
    • Author

    And now car won't start anymore... Couple times car start ok and now comes different errors: p0671, p0672, p0673 and p0674 cylinder 1,2,3 and 4 glow plug open circuit. 

  • Quote

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