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PRE-Heat.. 2001 Berlingo Hdi
Winter is here with vengeance in France. Zero degrees was my thermometer's greeting on rising. A very heavy frost indeed this morning and its most definitely 'brass monkey's' weather. Its the first time that the pre-heat light has shown itself. Briefly though, for less than a second. I tried to start three times, and each time the pre-heat light showed for less than a second, and turned off with what sounded like and electronic click. No way was it assisting in preheating the engine for that period of time. I had to wind the starter for a good 5 seconds to get it to start.

As a comparison.. my old V70 Tdi, with the D5252T Audi engine fitted, had its pre heat light on for a good 5 seconds before I started the engine.

Something's not right. Has anybody any ideas? Is there some sort of sensor lurking somewhere that controls the pre-heat on the 2.0 Hdi ?

Many thanks in anticipation..

The pre heating stays on a lot longer than the symbol.
2017 B9 1.6 BlueHDi Van
2012 B9 1.6 HDi Van
2008 M59 1.6 HDi Van
2003 M59 1.9D Van
As Zion says . . .  the warning lamp means very little on these modern direct injection diesels.

Have you checked if the glow plugs are working?

As for what controls the the pre-heat, I would imagine it's the outside temp sensor that sends a signal to the ECU that sends a signal to the glow plug relay.

My vehicle .... 2006 (m59) Berlingo Multispace Desire - 1.6 HDI 92 
The engine temperature has also got an influence on when the glow plugs work.
2010 B9 red XTR w a v. 
2001 1.9d DW8B white  Berlingo  
2005 2.l green Berlingo
2001 1.9d DW8B white  Berlingo 
berlingo 1.4 red multispace
1993 xud 1.9 red partner
Yes,  if the coolant temperature is above a set value the glow plugs don't perform a post heat which is normally around 3 minutes. . . The post heat will be cancelled as soon as the coolant reaches the set value.

I believe the post heat operates on every start up regardless of ambient temperature unless the above is in play.

My vehicle .... 2006 (m59) Berlingo Multispace Desire - 1.6 HDI 92 

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