Temperature sensor

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Nov 22, 1999 | 06:41 PM

Samantha

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Temperature sensor

Hi,

Occasionally when I started my car (cold or warm), the temperature sensor may register -67F for a while between it can correctly displays the correct temperature. Last time, the sensor registered -67F and revert to the right temperature after the car has travelled about 5-7 km (this time the car was started warm).

Is this an indication of a faulty sensor? Please advise. Thanks.

Sam
1999 1.8T QS Tip

Nov 22, 1999 | 06:47 PM

pdw

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Mines never done that. You should probably bring it to the dealer.

Nov 22, 1999 | 07:16 PM

K.L.

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Mine does that too at startup, but very quickly will show the correct temp, like after 30 sec. or so

Nov 22, 1999 | 09:24 PM

Cameron

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This is *not* a faulty sensor (much more)

this is an uncommon but recognized problems on four-cylinder turbo cars 1997 through 1999 not equipped with the trip computer feature.

The car will show -67, then -45, than the actual temperature, and sometimes stay at one of the "false" temperatures for some time. Also, if the car is stalled or put into neutral, the temperatuere display may go blank for a number of seconds.

No one knows what causes this problem, but this was a problem with my 1997 A4 1.8TQM and was annoying. It may also affect the A/C compressor, which works off the outside temperature reading, and hence your A/C compressor can be heard clicking on and off at idle.

My car had the sensor replaced two different times and had a replacement gauge cluster installed once, but the problem continued. One dealership suggested it may have something to do with the compressor or climate control logic. Email me for more information on this issue. There is presently no TSB.

Cameron

Audis...
1996 A4 2.8Q
1997 A4 (sold!)
1999 A4 1.8TQ
2000 TT 180Q (just arrived!)
2000 TT 225Q (April!)

Nov 23, 1999 | 06:52 AM

stevebrown

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My 98.5 30V does it occasionally, too

Nov 23, 1999 | 09:32 AM

Chris B

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Mine did something similiar.... (more)

I used to get false temperature readings, never as low as -65, but readings in the 60's during July in New Orleans. I went through a number of proposed fixes, including cleaning the connector, replacing the connector, and changing out some of the harness, but it was never fully fixed until a new sensor was installed. Since then, it has worked like a charm. I would have the dealer replace the temp. sensor.

Chris B
98.5 1.8T M