Question about 2002 Volkswagen Jetta TDI

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I have a 2002 vw jetta tdi there is a warning light that is almost always blinking it looks like a coolant or temp indicator but not sure i have no manual also sometimes the car has no power what so ever it will take forever to reach 50mph then other times it runs fine. what could be my problem with car running bad and what is the warning light that flashes?

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This could very well be the coolant resevoir/level sensor. if it is running poorly, these engines have a big tendency to foul up the throttle body and go from a 3" hole to about 1 1/2". if you take off the air horn to the throttle body and look inside you will be able to see what im talking about. now you can chip away at it but it must be done very carefully. dont let any fall down the intake. the proper way is to remove the manifold and let it soak. the egr is attatched to the throttle body and this is the reason for the carbon build up. also check your fuel filter. after this, it runs like a new car.

Posted on Jan 30, 2010

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Temp Sensor in my VW 2002 Jetta was replaced due to a Check Engine light and a code noting this needed to be done. Once complete my car began heating up. Coolant light came on and my temp gauge pegged in...


If your radiator fans are not running at all than I would check over the wires your disconnected when rpolacing the temp sensor. Make sure they are fully connected. That would be the first thing I would check.

Good Luck

Aug 01, 2011 | 2002 Volkswagen Jetta TDI

1 Answer

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

1 Answer

2000 jetta 2.0 gas - 15-20 sec after starting car the water temp alarm goes off; 60 sec later turns off. car runs fine and temp gage reads normal. Any ideas?


Have you checked the coolant level in the overflow tank? Make sure it's to the proper level. The coolant warning system can lose its little brain on the VW's. Sorry I can't be more helpful.

Mar 05, 2011 | 2000 Volkswagen Jetta TDI

1 Answer

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

2 Answers

I have a 2002 VW Jetta and the temperature gauge keeps going up and down... Is this something to worry about ?


Replace the 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_212.jpg

Please do rate my response. Thanks!

Feb 04, 2011 | 2002 Volkswagen Jetta TDI

1 Answer

Engine light on code p1296 was found the car is a 2001 jetta 80000 miles runs good all censor replace in the last five months it warms up fast idle good. pass smog. what can the problem be. thank you...


VW DTC 17704 (P1296) - Cooling system malfunction.

Coolant Temperature Sensor (CTS) is faulty and reading an incorrect temp'.

Replace with the new version of the sensor, clear the code.

If indicated coolant temp' is too low the thermostat is sticking open.

Jan 15, 2011 | 2002 Volkswagen Jetta TDI

1 Answer

Need exact location and picture of coolant temp sensor on tdi vw jetta 2004 please Thanks


The exact locations and picture of Engine Coolant Temp (ECT) sensors on 2004 VW Jetta TDI:

1. ECT sensor 1 placed on cylinder head:

4b3512b.jpg


2. ECT sensor 2 placed on the left bottom side of the radiator:

9ce325e.jpg

Sep 21, 2010 | 2004 Volkswagen Jetta

1 Answer

My 03 Jetta TDI temperature gauge had been indicating that the vehicle is operating at below normal temp some of the time. Even after a highway run. I had not had a rad flush in since l owned the car...


I think the light you are seeing is for low coolant. There may have been a small air pocket in the system. So just check the coolant level. If it is low add some. It's not uncommon to add a small amount a day or two after work was done on the coolant system.

May 18, 2010 | 2005 Volkswagen Jetta

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

Jan 19, 2010 | 2002 Volkswagen Jetta TDI

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