Question about 1999 Volkswagen Beetle

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What does it mean when the temp gauge comes on and is blue

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Thats perfectly normal, it stays blue until it reaches running temperature then should go out.

Posted on Aug 26, 2010

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With vehicle cold I put it in gear and go maybe 100' and temp gauge is topped out. When I stop the temp returns to normal in 3 seconds.


the temp gauge sends the power from the gauge to the sender unit which is a variable ground. That means that as the coolant heats up , the resistance in the sender is decreased and the current through the gage increases ans so the needle goes up
when that wire is shorting out some where the gauge will go to hot and when that short is removed the needle comes back down to cold
so that means that you will need to trace the wire along for where it is rubbed through or get an accredited auto electrician in to find the fault

May 11, 2016 | Cars & Trucks

1 Answer

Temperature gauge doesnt work


Are you getting heat?If so then the temp. sensor is faulty.It's a cheap fix for what you have already done

Jan 18, 2014 | 1994 Mercury Tracer

1 Answer

Scion xa 2006 dont turn control lights


blue temp light means coolant is not warmed up to operating temp-engine light won't come on unless there is a problem-cheers Denny

Nov 10, 2013 | 2006 Scion xA

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A water symbol with a temperature symbol in it what does this mean?


That's the coolant temp gauge of the engine, when it's blue it means the engine is cold, if it turns red the engine is overheating, if it stays off after the blue goes out the temperature is normal.

Mar 27, 2012 | Toyota Yaris Cars & Trucks

1 Answer

Spark knocks going up hills also temp gage not working


What do u mean by spark knock? Missfire? Temp gauge not working could be a few things, sender fault, no water, gauge fault or wiring. Check u have water in it. Then find the sender and earth it out, gauge should go all the way up, if it does replace the temp sender, if not it's gauge or wiring. Let me know about the spark knock.. Not sure what u mean

Oct 30, 2011 | 1990 Ford F150

2 Answers

I just had alot of work done on my 2000 beetle and now a yellow light that looks like the shape of the car with a lttle key is coming on. Also a blue temp gauge light comes on in the morning. What do these...


I would have the car rechecked for codes. The blue temp gauge light, may have something to do with the cooling system.

I would definitely have it checked by the dealer or the last place it was serviced in order to see how serious the problems are.

I don't think it's not a big deal, but anytime there are warning lights that go on for an extended period of time, there is potential for a more serious break down at an inopportune moment.

So, have it checked out.

Feb 12, 2011 | 2000 Volkswagen Beetle

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When i start my 99 dodge durango check gauge light come on


That means that one of the gauges are low. Or that something is wrong. Maybe the oil pressure is not coming up like it should. Or that the temp sensor is sending the computer a false reading saying that the temp is too hot. You will just have to look at the gauges to see which one is in the red.

Jan 13, 2011 | 1999 Dodge Durango

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Temp guage not working


It's most likely one of two things: 1) coolant temp sensor (meaning the gauge isn't working), or 2) stuck thermostat (meaning the gauge is working but the coolant isn't getting hot)

Start with the coolant temp sensor - it's on the back of the engine, somewhat near the top, toward the passenger side. On your car it's likely a blue sensor body (as is the CTS on my 99 A4 2.8). The easiest way to get to it is to remove the tube leading from the airbox to the throttle body. Take that off, and you can look down and see that there's a squarish plug with four wires plugged into the top of the coolant temp sensor (at the right angle you can see the color of the sensor - black, blue, or light green, but most likely blue on your car). There's a C-shaped retaining clip that holds the connector onto the sensor which must be pulled off (pull more or less straight back toward the firewall), and then the sensor can be unplugged. The sensor itself is just pressed into the opening in the block, not screwed in - you just have to pull upward to get it out (it can be tough - try opening the cap on the coolant tank to alleviate pressure in the system). The sensor is not expensive (around $25 from www.ecstuning.com - call them up with your VIN number to guarantee they send you the right sensor).

If you change that out, and it doesn't fix the problem, don't sweat it - it means your temp sensor was working, but replacing it was a good idea anyhow since they're prone to failure and can cause all kinds of wacky problems when they go. Next most likely problem is a thermostat stuck partially or fully open, and this is more invasive - it requires removing the front bumper, opening up the core support (with radiator and AC condensor), losing (and having to flush and refill) your coolant, and the removal of the serpentine belt and fans. It sounds horrifying but it's pretty easy actually.

I'd suggest starting with the CTS and see if it fixes the problem. If it does not, reply here and let me know and I can help you through the thermostat replacement if you're mechanically inclined and have the tools. If you're in the northeast, I can do either repair for you (I'm in the southern tier of NY) and save you a bundle over a dealership, and save you the aggravation of doing it yourself if you're not mechanical or don't have the tools or experience.

Apr 15, 2009 | 1998 Audi A4

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Please can you help why only after about a mile the engine is red hot but temp gauge is only showing middle. is this normal. YEAR 2001 WITH SERVICE HISTORY ONLY HAD SIX MONTH.


When you say "red hot" do you mean actually glowing? If so, you'd have serious trouble. If you mean only hot to the touch, that's normal - these engines run pretty warm. And yes, the gauge in the center is normal - the OEM temp gauge is a dummy gauge, only meant to show you that it's either cold, overheated, or mainly OK. Use your oil temp gauge as your main indicator - at least it's graded numerically and you can actually see the oil temp.

Jul 16, 2008 | 1999 Audi A4

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