Stop Engine Warning Light Comes On from Cold Start

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tonyredz
1.8 8v
Posts: 36
Joined: Mon Nov 01, 2010 3:59 pm

Stop Engine Warning Light Comes On from Cold Start

Post by tonyredz »

Hello,

When I start my car from cold Immediately the Stop Engine Warning Light Comes on with "Engine Temperature Too High".

The car is a 2003 2.0 Hdi 90hp

It started off as an intermittent problem now it does it all the time. It used to start and after a few minutes the warning lights came on, now it is doing it immediately after starting and the fan comes on.

I have let the car warm up on idle & after about 20 mins the warning lights stop appearing.

The car has been standing for a while now what with lockdown etc. Does it just need a good run, or should I change the Coolant Temperature Sensor?

Thanks for any advice.
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Doggy
Mod with a 2.2 HDi, De-Fapped!
Posts: 10710
Joined: Mon Oct 13, 2008 11:49 pm
Location: Northants

Re: Stop Engine Warning Light Comes On from Cold Start

Post by Doggy »

I would change the sensor.
Had a slightly similar issue with my last 2.2 HDi - didn't get the STOP light but the temperature gauge sometimes stayed on cold despite the heater working and oil temperature rising as normal.
Changing the sensor cured it, but clearing the airlocks was a prize PITA
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
GingerMagic
3.0 24v
Posts: 3569
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: Stop Engine Warning Light Comes On from Cold Start

Post by GingerMagic »

Definitely change the sensor, they are not too expensive really....

My previous 406 would show a hot engine on the gauge despite being first thing in the morning and I hadn't started the engine yet :roll:

An easy job but you will lose a bit of coolant - depending on how quick fingered you are.
2003 2.2hdi estate - mine
1998 Volvo 940 auto estate - also mine
2019 Citroen C3 something - the wife's
PP2000 user, can help with faults / diagnostics in the Bournemouth area.
tonyredz
1.8 8v
Posts: 36
Joined: Mon Nov 01, 2010 3:59 pm

Re: Stop Engine Warning Light Comes On from Cold Start

Post by tonyredz »

Ok thanks for your advice. I hear that Bosch or Denso sensors are the ones to go for,

Cheers.
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