Question about 2003 Volkswagen Golf
My engine coolant temperature gauge is not reading correctly, I changed it but it still doesn't read properly. The engine light is on and the emissions are high. Could all these problems be linked? Does anyone know what could be making the gauge read wrong?
If the temp gauge reading is high when the engine is cold it will be a short to the sender unit or a faulty sender unit ( as opposed to a temperature sensor unit). Have the fault codes read to find out what put the engine light on ( overheat)
Posted on Feb 10, 2014
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Posted on Jan 02, 2017
SOURCE: My car failed an inspection
Even check the coolant sensors. I had a sensor that went bad and it was seeping by the sensor. Another problem can be the plastic coolant flange that goes onto the head. They can crack, especially if the hose has been changed or pressed on while doing other maintenance. If the engine has been overheated the flange can also melt enough to allow coolant to seep out. Sometimes these only leak when the engine is hot and pressure has built up in the cooling system. Try using a web search engine using the codes.
Posted on Feb 06, 2009
The thermostat will show what the guage shows. the seal on the coolent bottle can be checked for tightness. so it could be a faulty sensor?
Posted on Apr 28, 2009
SOURCE: 2003 VW Golf - O2 Sensor?
Honestly it is not very expensive to replace, but it is not extremely important. What it does is measure the oxygen/fuel level coming out of the engine. This tells the computer that the engine is either using the right air/fuel mixture or allows the computer to change the mixture slightly to allow the car to run properly. You could pull the sensor out and clean the terminal as it usually has alot of carbon build up due to its location, but this is normally a temporary fix. I hope this helps you with your problem.
Posted on Jul 23, 2009
SOURCE: Check Coolant / STOP lights
If the coolant level is low in the expansion bottle then the light will come on and you need to locate the leak. If the bottle is full then the level sensor in the bottle is bad!
Posted on Aug 14, 2009
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Posted on May 15, 2010
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