Gas gauge not working properly and low oil pressure

AERIAL ELIZABETH

MEMBER
2003 BUICK CENTURY
6 CYL
AUTOMATIC
100,000 MILES

Hey guys! So, I just bought the car listed above with two problems.
First one, gas gauge always reads full. Doesn't go back and forth, it just always reads full.
Second problem, the low oil light comes on when you first turn the vehicle on, if you turn it off and on again, it goes away. But if you don't turn it off and on again it stays.
Other than that, everything is good! Thank you ahead of time!

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

Let's start with the fuel gauge issue as these are separate issues.

The fuel gauge issue is most likely a faulty sensor. The sensor is in the tank and is part of the float. I am attaching the info below, but we need to test this by checking the voltage coming from the sensor and if it is steady and does not drop when you are filling the tank with fuel then the lever is stuck, or the sensor has failed.

https://www.2carpros.com/articles/how-to-check-wiring

I am attaching the info below. Please run through this and let us know what you find.

As for the low oil light. Here is a guide that will help with this:

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure

I suspect this is a sensor issue as well but the way to check is to hook a mechanical gauge to the engine and see if the pressure is actually low.

Let's start with all this and we can go from there. Thanks

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