Why does my check engine light go off when I get gas?
There are many reasons your car’s check-engine light turns on after you fuel up. It could be a loose gas cap, a gasket gone bad on said gas cap, or a damaged vacuum hose, among others. If it detects a loss of pressure, the check-engine light will come on, indicating that there’s a problem.
Can bad gas set off check engine light?
Faulty gas cap – Your vehicle is pretty good at warning you of any potential trouble. Something as simple as forgetting to replace the gas cap could cause your “check engine” light to come on. This is because the gas cap keeps vapors from escaping the fuel tank.
What causes “check engine” light to come on?
Officially known as a malfunction indicator lamp, the check engine light can go on for a number of different reasons. In some cars, something as simple as a loose gas cap, which the car’s computer can read this as a leak in the emissions system, or even a change in humidity can cause the light to come on.
Will ‘bad’ gas cause check engine light to go on?
Sometimes a tank of bad gas can cause a “check engine” light to come on. If your indicator light is caused by bad gas, it will shut itself back off after you run a tank or two of good gas through the car. Bring the car in to have the code read.
What are common triggers of a check engine light?
A failed spark plug or ignition coil
What does “check engine” light usually mean?
The check engine light is a signal that the onboard diagnostics system (or OBD II) has detected a malfunction in the vehicle’s emissions, ignition, fuel or exhaust systems.