All Things Mk5 > How to Guides / Troubleshooting
Coolant temp
chris s:
Hi guys, I think I know the issue but wanted to see if anyone else has seen this issue and fixed it? The temp gauge on my dash no longer consistently shows 90 deg, it warms up in the usual timescales but on my new commute to work (20miles on the a1) the temp usually shows between 80-85deg, but rises to 90 when in traffic. I've done some research and it looks like it's the coolant sensor or thermostat. I hope it's the former but not 100% sure. Has anyone else seen this issue and fixed it? I'm keen to fix it once rather than try a few options and waste cash. Thanks in advance
phillips:
Definitely go with the Coolant Temp Sensor :happy2:
chris s:
Cheers mate, is it likely to be the sensor under my itg intake, to the left of the battery?
lukemk5gti:
I've actuly noticed the exact same in the past month. I drove 100 miles at 120km/hr and when I got home I was still around 80 degrees!
The following day as you said in traffic it rises to 90 so I thought all was ok!
Let me know how you get on with the repair. Going to tackle this and dv next week as I just got boost leak error code
phillips:
--- Quote from: chris s on August 16, 2014, 08:09:55 am ---Cheers mate, is it likely to be the sensor under my itg intake, to the left of the battery?
--- End quote ---
That's the one buddy just make sure you get the correct one. See below description:
--- Quote from: vRSAlex on January 10, 2011, 04:46:45 pm ---The coolant temp sensor is on a plastic housing underneath the fuel pump on the right side of the head. Its also a grey sensor. You will need to remove the airbox to get to it. Make sure you remove the coolant cap to release the pressure, then replace the cap before removing the sensor. This stops you losing too much coolant.
--- End quote ---
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