Thousands of drivers overcharged at a Garden State Parkway toll plaza last month will have the incorrect amounts removed from their accounts, according to officials.

Tom Feeney, the spokesperson for the New Jersey Turnpike Authority, says last Thursday, the agency received complaints from a few drivers who noticed they had been overcharged at the Great Egg Harbor toll plaza.

Since Sept. 20, nearly every vehicle in one particular lane had been classified as a truck and charged the truck rate. Officials discovered a cable tie on the gantry at the plaza had snapped and a cable was sagging and partially obscuring a sensor used to determine vehicle classifications. The sensor was mistakenly classifying everything as a class 2 vehicle.

The cable has since been fixed, but around 4,000 vehicles a day had been classified incorrectly during the over nine days the cable had been dangling in front of the sensor, meaning someone driving a car who should have been charged $1.96 was being charged $3.92 instead, or $3.72 during off-peak.

The problem affected about 23% of the vehicles that went through between Sept. 20 and Sept. 29.

Drivers don’t have to do anything to have it corrected. The fix will happen automatically for drivers. The class 2 charges will be replaced with the correct class 1 charges.