Question about 2003 Volkswagen Golf

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2003 volkswagen golf engine temperature gauge and engine light on

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?

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  • Volkswagen Master
  • 40,764 Answers

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

  • 7 Answers

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

  • 12 Answers

SOURCE: Temperature warning light coming on,on a 1992 Volkswagen Golf GTI

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

  • 439 Answers

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

  • 30 Answers

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

  • 632 Answers

SOURCE: the check engine light on a 2001 beetle read code

16502/P0118/000280 From Ross-Tech Wiki Jump to: navigation, search Contents [hide]

if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } 16502/P0118/000280 - Engine Coolant Temperature Sensor (G62): Signal too High Possible Symptoms
  • Difficulties with starting a cold engine.
  • Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
  • RPM at idle is irregular.
  • With all engine temperatures idle rpm will often vary between 900 - 1000 rpm.
  • With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.
  • Bad acceleration during warm-up.
  • Diesel Engines: Glow plug indicator may be on for a longer than normal time or at ambient temperatures where it shouldn't come on at all.
Possible Causes
  • The electrical signal coming from G62 is too low
  • Wiring and/or connections faulty (short circuit?)
  • Engine Coolant Temperature Sensor (G62) faulty
Possible Solutions
  • Check wiring and connections
  • Check / Replace Engine Coolant Temperature Sensor (G62)
Special Notes
  • In many cars between MY 1995-2002 the G2/G62 had a bad reputation for failing often. The original G2/G62 sensor is black and the improved replacements are green.

Posted on May 15, 2010

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