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What makes you think you need one?
 

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My new thermostat for the 156 jts 2.0 came with a new temp sender included (You change the whole body of the thermostat and housing on these )

Any help ?
 

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Discussion Starter #6
gazza, had warning light flick on and off slowly whilst going round a roundabout, then stay on. had a code read when the car was in at JJB motors, on examiner, turns out the coolant temp sensor has an intermittent open circuit, ie, its buggered.
 

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gazza, had warning light flick on and off slowly whilst going round a roundabout, then stay on. had a code read when the car was in at JJB motors, on examiner, turns out the coolant temp sensor has an intermittent open circuit, ie, its buggered.
Check the wiring that goes to the sensor before you condem the sensor itself.

It may also be corrosion on the sensor terminals.

If the sensor fails the colling fans will switch on, as the ECU will try to protect the engine.
 

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Discussion Starter #8
when i got home from that particular drive, the fans were going ape, so im assuming the sensor has now failed, especially seeing as the temp gauge in the car does not now work.

quick half-related question: is there a quick way to tell if my thermostat is knackered too, ie feeling a pipe?
 

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The temp gauge runs on a different sensor to the coolant sensor.

The ECU uses the sensor fitted to the thermostat housing. The gauge uses a sensor screwed in the cylinder head about 4" back from the thermostat.

If the gauge aint working check the wire going to this other sensor. There is only 1 IIRC.

If you disconnect the sensor on the thermostat housing the fans should come on, along with the injector light.
 

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The temp gauge runs on a different sensor to the coolant sensor.

The ECU uses the sensor fitted to the thermostat housing. The gauge uses a sensor screwed in the cylinder head about 4" back from the thermostat.
Nope.
Only one sensor.
The one on the thermostat.

Some early manual TS had two sensors though.
But most just have one.

His will only have one.
 

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Either the sensor or the connection to it.
 
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