BenzWorld Junior Member
Date registered: Dec 2009
Vehicle: 2000 ML55 AMG
Location: South Texas
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Flashing Fuel Low + Check Engine Light
I know this is an old thread. I'm posting a reply for the benefit of other owners who will google it, just like I did.
2000 ML55, 128000 miles -- known "dead spot" in the fuel sender near full. When we refuel the vehicle, we get a "full" reading for about 25 miles, and then an indicated empty tank with a Low Fuel light on for another 25, and then the indicator goes back to 7/8 full. And it works normally all the way down. Sometimes, we get sporadic normal signals in the dead spot, notably when we go over bumps.
So we know the sender has problems.
Today I was stuck in traffic for half an hour behind an accident, creeping along, if moving at all, over new pavement for half an hour. Nearly through it I got the flashing Low Fuel and then Check Engine. I don't think we've ever run the car that long without moving. The tank is about 5/8 full. It came out of the dead spot two days ago.
Hypothesis: normal driving makes the fuel level sender bump around and move across spots on the wound wire sender that have too much corrosion to send a consistently good signal. A lot of sitting allowed the sender to settle on a bad spot for long enough for the computer to notice, and it threw the fault. I'll have one of our guys check the codes over lunch to verify.