Why does my check engine light never come on?

If the check engine light is not coming on, then that is a good sign. If your dashboard before displayed the check engine light before and now it is not coming on, then the dashboard warning light could have burned out. If the dashboard light is good, then the ECM could be defective causing the light to not come on.

Why does it mean when your check engine light comes on and then it goes off by itself?

When the check engine light comes on, then clears by itself, it means that there is an intermittent fault. Get the car scanned, it will show the fault code in the code history. It may be something as simple as a lose gas cap, or something more important that may come back and even leave you stranded somewhere.

Can a check engine light be disconnected?

You can reset the check engine light without disconnecting the battery by using an OBD2 scanner. If you drive long enough after fixing the problem, most car models’ check engine light will go away by itself.

What does it mean when the Check Engine light comes on?

The reason why the check engine light comes ‘on’ is because the car has failed some type of test. Whether that is a continuous monitor like misfires, or engine timing, or non continues monitor like the catalyst or the EVAP system, or air fuel ratio. That kind of stuff. So, it runs all these tests and when it sees a problem, it fails the test.

Can you turn off the Check Engine light without a key?

Yes. If you want to turn off your check engine light yourself, then you will need an OBD code reader. It plugs into the diagnostic port commonly located under the dashboard in cars made in 1996 or after. These devices can be purchased at various automotive parts stores or online at various retailers such as Amazon.

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

Otherwise, you risk damaging your car. If the check engine light is on and steady (not flashing), you can keep driving as long as the car isn’t performing strangely. How is it handling? Driving straight or wonky?

Why is the cel light on in my car not working?

If all that checks out then it’s a problem in the computer module (lamp driver). Like others have already stated, the CEL light is usually turned on through the ECU which probably makes a ground connection inside the unit to turn on the lamp. You can check to see if there is voltage on the lamp lead going to the ECU.