temperature gauge showing negative?

2005 VOLKSWAGEN JETTA
133,000 MILES
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CREOLELADY
  • MEMBER
  • 1 POST
starting my car, the notice is showing _9 degrees. temperature outside is in the 35 degrees. once driving the temperature granulates to the outside temperature.. why is this happening?
Dec 10, 2022 at 12:24 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

Often times there is a weak connection at a sensor or module. On this vehicle, there is an ambient air temperature sensor that is located behind the lower grill in the front. See pic 1.

Here is what I suggest. Remove the lower grill, 2 screws at top, and inspect the wiring. Make sure the connector is tight, clean, and free of any damage. If it checks good, chances are the sensor is bad.

Pic 2 below shows what I believe the replacement part to be. Just confirm it with the seller.

Let me know if this helps or if you have other questions.

Take care,

joe

See pics below.
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Dec 10, 2022 at 2:22 PM
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