Why do I have a check engine light on but no codes?

Generally if the light is coming on and no codes are stored the processor that triggers the light is faulty or the circuit is shorted to power. disconnect that circuit from the ECU if the light goes off probably an issue with the ECU, if the light stays on look for a short to power on that circuit.

Will AutoZone clear a check engine light?

Does AutoZone Scan Check Engine Lights? AutoZone does. If your light is on, and you are wondering why, head down to your local AutoZone where one of our store associates can help diagnose the issue through our free Fix Finder service.

Is it safe to drive with the Check Engine light on?

As a general rule, unless the check engine light is flashing, you can still drive the car. A flashing “check engine” light indicates an engine misfire, which can cause irreversible damage to the car’s catalytic convertor.

Why would the Check Engine light come on?

The check engine light may come on for various reasons including if the gas cap is loose, oxygen sensor needs replacing, spark plugs need replacing and catalytic converter has a problem. It is a good idea to check the engine when this light comes on because it usually indicates a problem of some sort.

Can you drive a car with the Check Engine light on?

When the check engine light is on solid you can typically drive the car for hundreds of miles. Of course, it depends what code is stored in the car’s computer. If an engine sensor has gone bad, the car will usually put in made up sensor values that allows the car to keep running.

Why check engine light comes on?

A loose fuel cap is one of the most common reasons why the check engine light turns on. The cap is a crucial part of a car’s fuel delivery system. It notably prevents gasoline fumes from leaving the fuel tank, and it helps keep the whole system under the correct pressure.