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VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed.

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Old September 3rd, 2010, 08:01   #1
DonC
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Default Temperature Sensor/Gauge

Temperature gauge on 2004 Passat TDI finally pegged at 0. Started working erratically; now no reading. Any ideas on how to fix would be much appreciated.
Thanks.
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Old September 3rd, 2010, 10:24   #2
Joe_Meehan
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I would start by checking the connections at the sensor and the gauge. Remember to check the grounds.
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Old September 7th, 2010, 06:47   #3
DonC
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Thanks Joe. The gauge is erratic as it'll work when engine is "cold" get up to temp. (190) then fall back to 90 (zero) and stay there. Will check connections.
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Old September 7th, 2010, 07:59   #4
MOGolf
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Most likely the sensor has gone bad. This is typical symptoms of it.
It is not an easy sensor to get to on the Passats.
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Old September 7th, 2010, 19:34   #5
Sloppy Snood
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Change your thermostat.
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Old September 8th, 2010, 10:52   #6
DonC
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Thanks MOGolf. All indications are that it is, indeed, the sensor. Since this might be a bit more for me to tackle, I'm considering taking it to a repair facility where "hopefully" it won't be too costly.
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Old September 8th, 2010, 11:44   #7
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Quote:
Originally Posted by MOGolf View Post
It is not an easy sensor to get to on the Passats.
Considering that, I would likely replace rather than digging it out twice.
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Old September 16th, 2010, 07:12   #8
DonC
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It turned out to be the temperature gauge sensor. It took a couple of hours labor at the shop to replace.

Thanks to all for their helpful comments.
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