[bzbern]

Hey everybody, i need some help. I was driving my jetta on the highway when my temperature gauge went all the way up to the hottest temperature. The car didnt overheat though. I brought it to the mechanic up the block, he replaced a sencer and i think the thermastat, but that didnt fix the problem. Now, they don't know whats wrong with it. Instead of bringing it to volkswagen to pay a fortune, can someone please help me?

 

[pow3r hour]

could just be a bad coolant sensor

 

[NeverFast]

You can check the exhaust system if there are any clogs in it it could be causing a back up and heating issues but the car would also not run smoothly if at all.

 

[Sweat]

I would check the sensor first. I had the same problem with mine, I replaced the water pump and thermostat, and I had a temp gauge still telling me I was over heating when the engine was cool. The sensor is very easy to replace and its a fair priced item (25-60 bucks). I took it to the dealership to get it fixed it only cost me 324 dollars. I now know to do more research I could have saved a lot of money.

 

[ENRGZR]

Try to find someone with VAG-COM in your local area. You might be throwing "soft" codes. It would be cheaper than buying parts to see if that fixes it.

 

[pjnuts19]

a vag com isnt as common as you make it out to be, from what i know about it you need a dedicated lap top and about 1g to lay down just for the software (they have cheaper versions but the one that does it all is about a grand)

 

[ENRGZR]

a vag com isnt as common as you make it out to be, from what i know about it you need a dedicated lap top and about 1g to lay down just for the software (they have cheaper versions but the one that does it all is about a grand)

wrong. The software is free.
The cable from ross-tech.com is $350 for the one I got. http://www.ross-tech.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=VCHUC&Category_Code=VAGCOM It works on all OBDII cars.
I have let people borrow cables and just download the software to their laptop. If you don't want to buy one, you could check for someone local here http://vag-tool.kicks-ass.net/locator.aspx

 

[EvolGLI0281]

a vag com isnt as common as you make it out to be, from what i know about it you need a dedicated lap top and about 1g to lay down just for the software (they have cheaper versions but the one that does it all is about a grand)

Not true. Software is only a 100 bucks, but you get a license when you buy the cable. I wish i had thrown down another hundred for the "does all to OBD-II" cable. Maybe next month. http://www.ross-tech.com

 

[Reaver]

There are tools you can get considerably cheeper than vag.com like sealeys vag reader as seen in the link. From what your saying though there sounds like a good chance its gonna be a sensor only way to garentee an electrical fault code is a vag tool though sorry.

 

[black17ice]

The exact same thing happend to me

i was driving my 03 jetta 1.8T this past winter and about a half hour into driving my temp shot all the way up and was throwing me the idiot light. i didnt understand what happend at first and thought i just had a broken coolent hose. turns out all the coolent fans went at the same time. typical. possibly the cause?

 

[nattyice225]

Yeah, I have a 2003 1.8T and I have had a similar problem, It was the water pump, its about 40 bucks but they will charge you 80 for labor, if you know your way around an engine I would suggest putting it in yourself.

 

[borain]

wrong. The software is free.
The cable from ross-tech.com is $350

For my Bora (J4) I got a cheaper obd-cable at ebaY. It was a noname product and it cost about 30 EURos.
I had no problem with installing it and its still functionable.