When ECT sensor is plugged in the engine overheats

Tiny
R.L
  • MEMBER
  • 2004 JAGUAR S-TYPE
  • 1,222,259 MILES
When ECT is unplugged the engine does not overheat.
Sunday, September 15th, 2019 AT 9:55 AM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

The Engine Coolant Temperature Sensor (ECT) has nothing to do with whether your vehicle's engine is overheating or not. It is probably overheating all the time, and you can just see the gauge when it's plugged in. Your vehicle's engine is probably overheating because the thermostat is stuck closed or the water pump is failing. Let's start with the thermostat as it is the easiest to get to and the least expensive to replace. In the diagrams down below I have included the specs for the thermostat in your vehicle and the removal and installation instructions for it as well. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Sunday, September 15th, 2019 AT 11:20 AM

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