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Lower than normal running temp and lower mpg....

Discussion in 'A3/S3 Forum (8L Chassis)' started by VAGMAN1, Nov 13, 2006.

  1. VAGMAN1
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    VAGMAN1 Member

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    running at a lower temp on average lately (80-85degC) and mpg seems to have dropped. Can't be duff temp sensor as it was only replaced in may. Any ideas or quick checks?

    (1.9TDI 110ps)
    #1
  2. pablo
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    pablo Member

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    thermostat?
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  3. KEF A3 20V T
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    KEF A3 20V T Turbo's Rule

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    i am having the same probs! u got vagcom???? i checked my fault codes and got one sayin coolang sensor signal irratic so im finking it mite be my coolant sensor
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  4. VAGMAN1
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    VAGMAN1 Member

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    as I said, coolant temp sensor was only replaced in may, so can't be that. nothing else tells the ECU water temp (2 feeds from the temp sender - 1 to ECU and the other to the dash display)
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  5. KEF A3 20V T
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    KEF A3 20V T Turbo's Rule

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    Vag com will tell you for sure if it is the sensor or not!
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  6. vw754
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    vw754 vorsprung Durch Technik

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    taking longer to start 3-4 seconds (replaced temp sensor 3 month ago)
    green one, changed non return valve filter + filter seals twice,coolant sensor gone again??????????
    #6

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