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Thread: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor

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  1. VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Hi chaps,

    I've had a check engine light come on. I've used my carista app which gave me a P0117
    P0117.jpg
    I have issues with a long crank when starting the car. However, I've changed the Engine coolant temperature sensor and it still throws up this code (even after a reset)
    If I disconnect the plug from the sensor it throws up P0118 (And starts easier)

    The app says the Engine coolant temp is 139 degrees (Obviously wrong)

    I'm at a loss what to do?
    (Thanks in advance)
    Attached Images
     
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  2. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Was the sensor genuine from VW?
     
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  3. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Euro car parts
     
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  4. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Update

    Still have a long crank which I believe to be a worn starter

    Temperature gauge fluctuates massively, goes from 90 down to 50, to 75 etc
    Both sensors have been changed
    Thermostat has been changed
    P0117 code still there
    Checked the wiring from the sensor, and can’t find any breaks

    At a loss as what to do next?
     
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  5. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Have you viewed the live data of the temperature in the engine, HVAC and instruments to see if you get the same wild variations as the gauge is showing?
    A petition has been started to allow the use of synthetic fuels when they become available, this may allow the continued sale of ICE vehicles post 2030 and the use of classic vehicles well into the future… Their use may even be able to rival electric vehicles given the chance. Please sign this petition IF you feel the infernal combustion engine has a future if sustainable fuels are made available


    https://petition.parliament.uk/petitions/588774
     
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  6. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Quote Originally Posted by Crasher View Post
    Have you viewed the live data of the temperature in the engine, HVAC and instruments to see if you get the same wild variations as the gauge is showing?
    Thanks for the reply

    Yeah the live data is all over the gaff according to my app (I've attached a pic)
    Don't understand what HVAC is?

    Cheers

    coolant temp.jpg
     
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  7. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Have you tested the continuity of the wires from the G62 to the ECU? The signal is sent to the other controllers on the CAN BUS so if the sensor and wiring are good then it is the ECU corrupting the signal.
    A petition has been started to allow the use of synthetic fuels when they become available, this may allow the continued sale of ICE vehicles post 2030 and the use of classic vehicles well into the future… Their use may even be able to rival electric vehicles given the chance. Please sign this petition IF you feel the infernal combustion engine has a future if sustainable fuels are made available


    https://petition.parliament.uk/petitions/588774
     
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  8. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    I've followed them to the port (not sure of the official term, has a ton of wires into it on the right hand side of the engine), the wiring is wrapped and follows around the engine after that, should I take the black protetive tape off to continue the check? I've ordered a multimeter to test the voltage etc.
     
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  9. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    Update

    Whilst on a short drive on the motorway, I noticed the temperature pushing 130. As I slowed to 60 or so it went back down to 90-100
    On stopping at home, the coolant was boiling in the coolant resevoir. Sticking hand on the outside of the tank and it's ridiculously hot. You can hear the coolant boiling in the pipes on the right hand side of the engine after I switch the engine off
    There's no oil with the coolant and nothing but oil on the bottom of the oil cap, so don't think it's the gasket.

    Checked the radiator pipes. The top one was absolutely roasting and the bottom one was air temperature
    My radiator fans also work, they'll come on when the car ignition is on

    Edit Ran car with top hose to coolant resevoir off and coolant cap off, good flow of water

    Help
     
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  10. Re: VW Golf MK5 2.0 GT TDI (BKD) G62 Engine Coolant Temp Sensor 
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    If you can see flow it is unlikely to be the water pump, which make of thermostat did you fit?
    A petition has been started to allow the use of synthetic fuels when they become available, this may allow the continued sale of ICE vehicles post 2030 and the use of classic vehicles well into the future… Their use may even be able to rival electric vehicles given the chance. Please sign this petition IF you feel the infernal combustion engine has a future if sustainable fuels are made available


    https://petition.parliament.uk/petitions/588774
     
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