Technical Oil Pressure Warning

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Technical Oil Pressure Warning

Joined
Apr 25, 2016
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Leeds
Had my 500 (lounge) just over a week, let a friend have a quick go (crazy I know!) and she stalled it. An oil pressure warning light came up? It disappeared once the engine turned back on. Is this just a consequence of it stalling? Checked the oil levels but its hard to tell because its so clear!
Thank-you for any replies in advance
 
When the engine stalls the oil pressure will fall but you are still in the running position of the car, hence you receive the error. Just restart the engine and carry on as you know by stalling it there isn't actually a fault in the system.

If you see the error without stalling id stop the engine as soon as possible and seek assistance from a recovery truck etc
 
As said above, that should be fine. Check the oil level to be safe, if it looks fine and the light doesnt come on keep on driving as if this never happened.
 
get it checked out... especially if it starts flashing while driving. I ignored it and wound up needing a new engine on my 2013 Fiat 500 pop at 45kmiles
 
When the engine stops turning, the oil pump stops too, hence the oil pressure warning light.

D
Exactly as rallycinq says. The engine has oil in it's sump and the engine has an oil pump which is directly driven by the engine. The oil light is connected to a pressure switch screwed into the engines oil system. When the engine is not running the oil pump is not being driven so there's no oil pressure to act on the pressure switch which is designed so the oil light will light when there is no pressure - So, engine stationary, oil light lit.

When you start the engine the oil pump is immediately driven by the engine. (if the engine is turning so must the pump - unless something is actually broken!) It immediately sucks oil up from the sump (which is why you need to check the level from time to time - got to be enough!) and pushes it, at pressure (commonly around 40 to 60 psi) round all the bits of the engine that need oil. As it goes it pushes on the oil pressure switch which turns off the electricity to the oil light on your dash and so the light goes out. Of course if you stall the engine it stops turning so the pump stops turning so there's no oil prerssure so the light comes on! Voila!
 
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