Really freaky-

[KANE]

Today, when I was driving- this happened twice today- the fuel gauge suddenly dropped to empty from 3/4 and (later today) 5/8 of a tank. Now, it stayed that way until I shutthe car off. Then it, when I re-started the car- it was fine.

Any clue? Sending unit? What gives? This has NEVER happened before.

I remember about 9 months ago, the car went into reduced power mode... then it didn't do it again. Twice in a row. Then it didn't do it again.

 

[Blade]

Fuel sensor might need to be replaced.

Same thing happen on my 98. Just one of the little bugs in early production C5s.

 

[Tuna]

This continues to be a bug with the C5. Happened on my 03 last year. Fuel sender unit in one tank went stupid for a bit. Since it has two tanks and senders, if one is off, the computer dumps the whole signal and send empty to the tank gauge.

There has been some success with a good fuel system cleaner. I recommend BG 44K and Red Line.

If that doesn't help, then you'll be visiting the dealer for a replacement.

 

[c5vetter]

well known problem - there's a TSB

 

[bossvette]

Mine does it from time to time on trips, I always set trip a at each fill-up

 

[wwr]

Owning one

You got to love it to own it. I'm waiting, as someone said "for the deal of the century".
wwr