Help please 'techies'

[lozza]

I have a strange fault on my 02 Cupra at the moment. When you start from cold on a frosty morning, the temp warning beeper goes off and the warning light flashes until you stop the engine. If you stop the engine immediately and restart, the fault goes away. I have checked the coolant level and it is fine. Also, the fault only occurrs on really cold mornings, so I figure it must be a faulty temp sensor somewhere - but why does it clear when you restart the engine regardless of how long it has been running I tried calling in the AA man, but he came on a frost free morning and there was no fault Can anyone suggest which sensor might be at fault, and where it is located?

 

[Andy3004]

Who's going to say the 's' word first!!!!!

 

[CRAIGLCR]

there is a temperature sensor in the water header tank that gives the same symptoms when its faulty!! if your car is under warranty take it into the stealers and they will tell you exactly which one it is as soon as they plug your car intot he diagnostics m/c!!

 

[RobM]

Who's going to say the 's' word first!!!!!

Gimme an S.....

Gimme an E.....

 

[Andy3004]

Gimme an S.....

Gimme an E.....

horrah!!!!

 

[gtd86]

x? i dunno...

 

[chris_m]

Just the sensor aggravated by the cold weather i reckon. Had the same thing on my Golf 1.8T - it happened three mornings in a row *STOP!* - and never happened again after that.