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  1. Ertdes

    Audi A3 1.6 TDI: Engine Underheating

    It's DSG (DQ200). My understanding is that it does not have an inline thermostat so it rules that out :frown: I have logged the temperatures again with the fan activation (images below); this was during a drive with a mix of city and motorway driving. I have also included the log the garage...
  2. Ertdes

    Audi A3 1.6 TDI: Engine Underheating

    Hi all, I have an Audi A3 1.6TDI 2010 (CAYC). For several months now the car appears to be underheating (coolant temp on the dash gauge dips below 90) with no fault codes: In 2024, I replaced both coolant temperature sensors (one at the engine block and one on the pipe going towards the EGR)...
  3. Ertdes

    A3 8P 1.6 TDI - Bad Fuel Temp Sensor and Thermostat?

    Hi NHN, thanks for getting back to me and I hope you are well! Yes they are; I can see why they are given the stealership name. The secondary water pump, heater matrix and expansion tank/cap were changed last year due to the car overheating. I can hear the secondary water pump buzzing when I...
  4. Ertdes

    A3 8P 1.6 TDI - Bad Fuel Temp Sensor and Thermostat?

    Hi all. I have 2 queries which I would appreciate help with. Car is a 1.6 TDI 8P 2010. The links to my data logs from VCDS are below: Coolant and fuel temperature data log (logged doing town and motorway driving) Air mass, timing belt position, EGR, charge air pressure, fuel high pressure data...
  5. Ertdes

    A3 8P 1.6 TDI - Bad Lambda Sensor?

    Hi all! I have a 2010 Audi A3 8P 1.6 TDI. For a few months now, the car has been bugging me with an intermittent slight rough idle (no fluctuating revs, just mild shaking that can just be felt through the seats). Additionally, the car seems to be actively regenerating every week which is new...
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