Question about 2006 Volkswagen Jetta

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2006 Jetta 1.9 TDI Temperature\Thermostat Dash Light

My Temperature\Thermostat Dash Light come's on first thing in the morning and once the car warms up, i can turn it off and start it again and it clears and it won't come back till the next morning after it has been sitting all evening. The ligkt flashes three times and it beeps three times gbefore coming on solid and it will repeat if i just turn it off and turn it on again if i haven't warmed it up.

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  • pmancan May 08, 2009

    Sorry for not responding, I just finished replacing my serpantine belt and still the same problem. I was thinking that it could be the thermostat.



    Thanks

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Sounds like you just have a loose alternator belt and since the system takes longer the light s tay oon until the alternator starts charging the battery by then the engine is already warnmed uyp

Posted on Nov 13, 2008

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Posted on Jan 02, 2017

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Jetta 4 2.3 v5 heater does not work,only blows cold air


Hi, if the temperature gauge read zero then the thermostat is gone.
If it's just no heat and the gauge on the dash is reading normal coolant temperature then it may be the Coolant Temperature Sensor. If the heater core was gone there should be a leak inside the car somewhere. Hope this helps

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How to test ECT sensor? 2002 jetta TDI, temperature indicator would go up and down but car was warm and hater output ok


Replace bad Engine Coolant Temperature (ECT) sensor. ECT sensor is placed in the right back side of the cylinder head on 2002 VW Jetta 1.9 TDI. See picture below:

tdisline_388.jpg

Mar 30, 2011 | 2002 Volkswagen Jetta TDI

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My 2000 Jetta TDI blows cold air while driving. No fun this winter! I would expect a bad thermostat; but I understand if the thermostat is bad a warning light would be lit on the dash. Is that the case?


No, this is not your case. If the thermostat is bad any warning light would be lit on the dash.
First time you might check the thermostat operating.
Heed of antifreeze coolant temperature!!!

The thermostat location for 2000 VW Jetta 1.9 TDI, is on back of the alternator at the bottom side of the bracket.
IMPORTANT: It is NOT necessary to replace the alternator if you want to change the thermostat !!!
Thermostat checking:
1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!!
2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg.
3. The thermostat opening temperature is 87 C deg.
4. If the hose is already warm the thermostat is out of order.

Thermostat location, Part number: 044121113, in german - "Kuehlregle" (Price around $25):


tdisline_250.jpg
Important note: Always replace the thermostat round seal, position 7 in the above picture.

Please do rate my response. Thanks!

Feb 11, 2011 | 2000 Volkswagen Jetta TDI

1 Answer

Where is my thermostat in 2000 jetta 1.9 liter


Heed of antifreeze coolant temperature!!!
First time you might check the thermostat operating.
The thermostat location for VW Jetta 1.9 TDI - AJM engine, is on back of the alternator at the bottom side of the bracket.
IMPORTANT: It is NOT necessary to replace the alternator if you want to change the thermostat !!!
Thermostat checking:
1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!!
2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg.
3. The thermostat opening temperature is 87 C deg.
4. If the hose is already warm the thermostat is out of order.

Thermostat location, Part number: 044121113, in german - "Kuehlregle" (Price around $25):

tdisline_179.jpg


Important note: Always replace the thermostat seal, position 7 in the above picture.

Please do rate my response. Thanks!

Jan 23, 2011 | 2000 Volkswagen Jetta TDI

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2006 jetta tdi, ambient temperature location? my a/c quit working and i have no power at the compressor plug, it is up on charge, the dash temperature sensor quit working this winter, this not reading...


the sensor should be located behind the front bumper grill.look through the bumper grill and you should see the ambient temp sender.on the dash,does the display where the temperature used to read have 3 dash lines?if so there is an open circuit in the wiring to the sensor.this will cause the aircon not to work..good luck.

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1 Answer

Vw jetta 2002 code p1296/po118


Both of these codes indicate trouble with the signal from the coolant temperature sensor.

So either the sensor is bad. The thermostat is not working properly and the coolant temperature is truly way out. The wiring to the sensor is short or open. The computer is bad and it is manifesting itself through this fault.

Does the car warm up properly? If it runs hot, or takes forever to warm up, this indicates a problem with the thermostat.

If the car runs at the proper temperature the next thing to look at is the coolant temp sensor and wiring. Some resistance values for VWs are here:
http://forums.vwvortex.com/zerothread?id=4267675

You might also be interested in this recall if your car is below 100k miles:
http://forums.vwvortex.com/zerothread?id=3694323

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some times new thermostat are bad . try a new one but hotter 195* or better

Jan 14, 2009 | 2000 Volkswagen Jetta TDI

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vacuum to blend doors cancels when engine uses it upon acceleration... there is a check valve that could have failed there at vacuum lines to blend doors .good luck

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2000 jetta warms up when idling, but gets cold as soon as I start driving.

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Temperature Sensor in 2002 Jetta TDI


NO the temp sensor is located on the head near the heater hoses close to the 4th cylinder if i am not wrong it is color coded and green

Nov 12, 2008 | 2002 Volkswagen Jetta TDI

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