"coolant" warning light tuned on?

2006 MERCEDES BENZ VITO
180,000 MILES
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LIZAVERREYNE
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Please this is very urgent! I've never had problems with my Vito. But now that I drove approximately 900 km (quite a lot faster than usual) to deliver the car to a new owner, it gives me problems.

First the "coolant" warning light came on but after switching the engine off and on, the warning stopped but I checked it anyway. About 100km further the yellow engine diagnostic indicator lamp light came on. My manual says its either out of fuel (not so) or running in emergency mode.

I have NO clue as to what to do! Please help me urgently as I must deliver the car in about 2 hours!

Liza
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Feb 28, 2013 at 9:56 PM
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TMONTEIRO
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Hi lizaverreyne,

This problem occurred to me once. It most probably must be a clogged EGR valve. I believe it analizes exaust fumes or pressure so to adapt the fuel injection.

You can either replace the valve or clean it well and reinstall. The light will only come out at a dealer. You can ask them to "erase" that light or any light for a cheap price.

The only thing is if the problem continues to appear...

In emergency mode, the car will just be operating at half it's power, and revs limited.

Hope this helps, regards,

TMonteiro
Mar 12, 2013 at 2:20 PM
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CDINC2006
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You can attempt clearing the codes by removing negative terminal and leaving it off for 30 minutes. While it's off turn on headlights and attempt to start it. This way any stored energy keeping ecm alive will be dissipated. Essentially clearing the codes. It doesn't always work but in a majority of cases it does. Also check air filter,mass air flow sensor/clean it, check intake air temp sensor/clean it,and clean egr tube,egr passages to cylinders,and clean egr valve. Electronics components clean with qc cleaner(iat,mass air flow). Carb and choke cleaner can be used for egr components.
Sep 2, 2023 at 9:15 PM
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JACOBANDNICKOLAS
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Hi,

Thank you for that information. The post is somewhat older. However, your addition will likely help others in the future.

Take care,

joe
Sep 2, 2023 at 10:08 PM