Why Is Your Car’s Gas Gauge Sometimes Inaccurate?

Why Is Your Car’s Gas Gauge Sometimes Inaccurate? | Birch Run, MI

Have you ever run out of gas while the needle on your gas gauge still showed that you had fuel in your tank? Inaccurate gas gauges are more common than you might think, and they can lead to dangerous situations on the road. If you’re concerned that your gas gauge is inaccurate, there are a few potential reasons behind the discrepancy.

Sending unit issues

Problems with your vehicle’s sending unit are the most common factors behind an inaccurate fuel gauge. The constant motion of your car could lead to the sending unit rubbing against the variable resistor, sometimes leading to an open circuit. If your sending unit fails, the voltage it sends to the gas gauge might be interpreted as EMPTY or FULL, leading to an incorrect gauge.

Circuit problems

A faulty circuit can lead to a fuel sender with no voltage source, a gas gauge with no voltage from the fuel sender, or an interrupted ground for either component.

Faulty gas gauge

A busted internal circuit could cause a variety of inaccurate gas gauge reports: only functioning between FULL and HALF, HALF and EMPTY, either FULL or EMPTY, or, in the case of an open circuit, always sitting at EMPTY.

Instrument cluster errors

This is the least common cause of a faulty gas gauge. If a problematic cluster leads to a busted gauge, you will need technicians to replace the entire cluster.

No matter the cause of your inaccurate gas gauge, taking your vehicle into Suski Chevrolet Buick for expert service will ensure that the problem is fixed quickly and safely.

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