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Gas gauge not working

Tiny
A.TREVINO
  • MEMBER
  • 2002 BUICK RENDEZVOUS
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
I will fill it up and the gauge remains at E. I run and run it trying to keep track of mileage. However, I cannot keep taking the chance possibly running out of gas. Nobody seems to know what the issue is.
Wednesday, November 28th, 2018 AT 6:40 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The issue is not hard to diagnose at all.

What needs to be checked is the voltage at the sender unit at the fuel tank. Voltage is sent to the unit and the return voltage is what is sent to the gauge unit.

The most common failure is the sender unit in the tank. Before that is confirmed, on your car there is a connector under the car by the left rear door that connects the car to the harness for the sender. It is very common for this to corrode and cause the issue. It may be as simple as cleaning or repairing it.

This can be confirmed when the voltage check is done at the sender. If there is no voltage, then the connector needs to be checked. If there is voltage, the sender may be the issue.

Roy
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Thursday, November 29th, 2018 AT 7:24 AM

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