Coolant level warning
Thread Starter
Senior Member
Joined: Apr 2016
Posts: 287
Likes: 29
From: Orange County, Ca
2004 E55, Triumph Speed Triple
Coolant level warning
Hi all, my mom has an 2009 E350, and the coolant level light 
comes on intermittently, then goes off after a couple minutes, and the coolant level is fine. Any idea what would cause this? I'd imagine there is a level sensor somewhere that is bugging out.
Thanks,
Tyler
comes on intermittently, then goes off after a couple minutes, and the coolant level is fine. Any idea what would cause this? I'd imagine there is a level sensor somewhere that is bugging out. Thanks,
Tyler
Member
Joined: Jun 2016
Posts: 128
Likes: 9
W211 E270 cdi 2004
This happened to me as well, coolant level was fine but the message after a while will stay on as soon as you start the car. It turned out to be a faulty coolant reservoir tank in my case. It was changed and the message was gone.
If coolant level is fine and the engine temperature stays where it should be then nothing to worry about. When is the car due for coolant flush?
In your case, disconnect the coolant level sensor and see if the message is still their.
Secondly, check the connectivity on wire coming to the coolant sensor.
That's the route I followed and we narrowed it down to coolant reservoir.
Hope this helps.
If coolant level is fine and the engine temperature stays where it should be then nothing to worry about. When is the car due for coolant flush?
In your case, disconnect the coolant level sensor and see if the message is still their.
Secondly, check the connectivity on wire coming to the coolant sensor.
That's the route I followed and we narrowed it down to coolant reservoir.
Hope this helps.
Thread Starter
Senior Member
Joined: Apr 2016
Posts: 287
Likes: 29
From: Orange County, Ca
2004 E55, Triumph Speed Triple
This happened to me as well, coolant level was fine but the message after a while will stay on as soon as you start the car. It turned out to be a faulty coolant reservoir tank in my case. It was changed and the message was gone.
If coolant level is fine and the engine temperature stays where it should be then nothing to worry about. When is the car due for coolant flush?
In your case, disconnect the coolant level sensor and see if the message is still their.
Secondly, check the connectivity on wire coming to the coolant sensor.
That's the route I followed and we narrowed it down to coolant reservoir.
Hope this helps.
If coolant level is fine and the engine temperature stays where it should be then nothing to worry about. When is the car due for coolant flush?
In your case, disconnect the coolant level sensor and see if the message is still their.
Secondly, check the connectivity on wire coming to the coolant sensor.
That's the route I followed and we narrowed it down to coolant reservoir.
Hope this helps.
At any rate, thanks for pointing me in the right direction.
