Gas gauge not working

Tiny
ZAKARIYA
  • 2001 BUICK CENTURY
  • 120,000 MILES

Gauge either shoots to full, or drops down to empty. Does the sender have anything to do with the gas tank and specifically the FLOATER? I was told the the fuel pump and gas tanks floater is the cause of this issue.

Do you
have the same problem?
Yes
No
Wednesday, March 14th, 2012 AT 1:07 PM

8 Replies

Tiny
2CARPROS KEN
  • ADMIN
  • 5,371 POSTS

Hey ZAKARIYA,

There is a fuel level module which is the BCM that could be bad, let's try to unplug the harness to the tank and see if it drops down to zero. That would indicate a bad sender which is the most common cause.

Here is a wiring diagram that will show how the system works.

Please run some tests and get back to us so we can continue helping you.

Best, Ken

Please consider a donation to help us answer more questions.
Was this
answer
helpful?
Yes
No
Wednesday, December 14th, 2016 AT 5:15 PM
Tiny
BRADY GUARD
  • 2003 BUICK CENTURY
  • 3.1L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
  • MERGED

Sometimes the fuel gauge reads full and then sometimes it goes to empty with the low fuel light while the car is running. I shut it off and started back up it goes back to full. Do I need to remove the rear seat in my car to access the fuel sending unit?

Was this
answer
helpful?
Yes
No
-1
Wednesday, December 14th, 2016 AT 5:17 PM
Tiny
HORSESC@COMCAST.NET
  • 2002 BUICK CENTURY
  • MERGED

Other Category problem
2002 Buick Century 6 cyl Two Wheel Drive Automatic 73000 miles

gas gauge works somtimes and doesn't work sometimes

Was this
answer
helpful?
Yes
No
Wednesday, December 14th, 2016 AT 5:18 PM
Tiny
BMRFIXIT
  • EXPERT
  • 19,526 POSTS
  • MERGED

1st to check is the intank sending unit

Please consider a donation to help us answer more questions.
Was this
answer
helpful?
Yes
No
Wednesday, December 14th, 2016 AT 5:18 PM
Tiny
MILESAWY
  • 1993 BUICK CENTURY
  • MERGED

Electrical problem
1993 Buick Century 6 cyl Front Wheel Drive Automatic 100000 miles

the gauge is in fact working only when the sending unit is partially out of the tank, otherwise it goes directly past full and doesn't work at all as far as the amount of fuel in the tank.

Was this
answer
helpful?
Yes
No
Thursday, December 15th, 2016 AT 1:15 PM
Tiny
ZACKMAN
  • MEMBER
  • MERGED

Bad sending unit.

Was this
answer
helpful?
Yes
No
-1
Thursday, December 15th, 2016 AT 1:15 PM
Tiny
JOHNNYBGOOD6
  • 1996 BUICK CENTURY
  • 4 CYL
  • 140,000 MILES
  • MERGED

I own a '96 Buick Centrury, My fuel gauge fluctuates constantly, and my radio doesn't work. Any ideas?

Was this
answer
helpful?
Yes
No
Thursday, December 15th, 2016 AT 1:16 PM
Tiny
WRENCHTECH
  • EXPERT
  • 20,679 POSTS
  • MERGED

I doubt those 2 things are related. The gas gauge is likely a bad sender in the fuel tank.

Please consider a donation to help us answer more questions.
Was this
answer
helpful?
Yes
No
Thursday, December 15th, 2016 AT 1:16 PM

Please login or register to post a reply.

Related Instrument Cluster Gauge Fuel Level Not Working Questions

Help us by donating