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Please help! This only happens on cold start

darkknight96
darkknight96
in Ford Focus Club

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Hello everyone , i hope you can help me solve this issue. I have a 2012 Focus MK2.5 with Duratec 2.0 HE. I will attach a youtube link to show you the problem. Thank you in advance

PS: Scanner shows error code P0133 , slow response on O2 Sensor B1S1. Thats the only visible code

Edited by darkknight96

  • Quote


    What do the dash warnings mean in English?

    Has the battery been checked?

  • Quote
    9 hours ago, TomsFocus said:

    What do the dash warnings mean in English?

    "It's broken"?

    But seriously, I can't even make out what language it is - the pause/play symbols on my device screen are right over the text so I can't freeze it to read it!

  • Quote
    • Haha 1
    • Author
    12 hours ago, TomsFocus said:

    battery

    12 hours ago, TomsFocus said:

    What do the dash warnings mean in English?

    Has the battery been checked?

    Yes , i've already checked it. The dashboard says "Insert key , press stop" , that was because i pressed the button to turn off the engine

  • Quote
    • Thanks 1
    • Author

    This morning i tried again but did something different: as soon as i heard the engine crank , i lifted my foot on the clutch. Sorry for my bad English , i hope you can understand

  • Quote
    10 hours ago, darkknight96 said:

    Yes , i've already checked it. The dashboard says "Insert key , press stop" , that was because i pressed the button to turn off the engine

    Ok. I was hoping it said 'press brake'. Which would have pointed towards a faulty clutch pedal switch.

    If the battery is also good then I do not know what's causing this.

    It could be the common cluster solder starting to fail but if this is the only fault you can see then even that is not very certain.

  • Quote
    • Author

    The other day i disconnected the ECT sensor and started with no issues , that gives me the hint that could be something related to a bad mix on cold. I've already replaced this sensor , do i need to reset the ECU so it can read the new values?

  • Quote
    7 hours ago, darkknight96 said:

    The other day i disconnected the ECT sensor and started with no issues , that gives me the hint that could be something related to a bad mix on cold. I've already replaced this sensor , do i need to reset the ECU so it can read the new values?

    Unplugging the temp sensor just makes the ECU run a default value. That can mask other faults. It does not prove the sensor is faulty.

    There is no reset for this type of sensor. It should just work immediately after changing. Do you have any tool that can show the exact ECT readings?

  • Quote
    • Like 1

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