M274 Coolant Temperature
- Thread starter markjay
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85
OP
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Well I thought it was 83-84 myself, and this is OK, if a bit on the low side.
From my other cars, I am more used to a cycle of 85-90-85 etc, this car seems to 'sit' on 80-85 instead, but this is not necessarily an issue.
However..... this is what the OBDII temperature reads:
From my other cars, I am more used to a cycle of 85-90-85 etc, this car seems to 'sit' on 80-85 instead, but this is not necessarily an issue.
However..... this is what the OBDII temperature reads:
OP
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The OBDII temperature fluctuates between 70 and 75. It is normally 70, it only gets to 75 after a long period of idle.
I am aware that the engine has a separate sender for the coolant temperature gauge, and a dedicated temperature sensor for the ECU, and that the two are not located in the same place in the cooling system.
But I am still not sure it's quite right that they have a 10 degrees discrepancy between them.
(I have tried other ODBII scanners and the temperature is showing the same).
Could the ECU coolant temperature sensor be faulty?
I am aware that the engine has a separate sender for the coolant temperature gauge, and a dedicated temperature sensor for the ECU, and that the two are not located in the same place in the cooling system.
But I am still not sure it's quite right that they have a 10 degrees discrepancy between them.
(I have tried other ODBII scanners and the temperature is showing the same).
Could the ECU coolant temperature sensor be faulty?
OP
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Today's discrepancies.... oddly, in the opposite direction:
I guess the coolant temperature gauge sender and the ECU coolant temperature sensor are located in different parts of the cooling system.....
I guess the coolant temperature gauge sender and the ECU coolant temperature sensor are located in different parts of the cooling system.....
A man with one watch knows the time.
A man with two watches isn't sure.
A man with two watches isn't sure.
Uky
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...So he buys another one.
(This has also been quoted in "Time Nuts", a mailing list for enthusiasts that keeps hydrogene masers and cesium clocks in their garages just to be sure...)
(This has also been quoted in "Time Nuts", a mailing list for enthusiasts that keeps hydrogene masers and cesium clocks in their garages just to be sure...)
