Normally, the appearance of a check engine light indicates a problem somewhere in your vehicle, but nothing seems amiss. Your car is still running at its best and there seems to be absolutely nothing wrong. … It doesn’t have to take a mechanical issue in order for this light to appear.
Can check engine light come on for no reason?
The check engine light can come on for many reasons. For example, something as simple as a loose gas cap can trigger the warning. And major problems, such as failed internal engine components, can turn on the light, as well.
Why is my 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.
What is the most common reason for check engine light?
Replacing a faulty oxygen sensor — a sensor used to optimize a vehicle’s fuel-to-air mixture to increase gas mileage and reduce emissions — is the most common cause for a check engine light.
What does a solid check engine light mean?
A solid Check Engine Light can mean something like a loose gas cap, or it can indicate a more in-depth problem like a fuel, timing, or transmission issue. Get your car diagnosed, although the urgency isn’t the same as if the light was flashing at you.
Can AutoZone 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.
Can check engine light reset itself?
Your car’s check engine light will reset itself after you repair the problem in most car models. But it may take some time. A car usually needs 10-20 successful cycles before it will reset the check engine light by itself. … Therefore it’s much easier to reset the check engine light with an OBD2 scanner.
Will check engine light come back on after reset?
It could come back on immediately or the next time whatever set the code to happen again. Generally when a check engine light has been reset it takes 60–70 miles for all the readiness counters to reset.
What can throw a check engine light?
4 Common Reasons the Check Engine Light Comes On
- Broken or Loose Gas Cap. A loose or faulty gas cap will allow gasoline to evaporate out of the filler hose, causing the check engine light to come on. …
- Faulty Mass Air Flow Sensor. …
- Bad Ignition Coil. …
- Catalytic Converter.
Can you drive with a solid check engine light?
When your car’s check engine light is solid, you should be able to drive it. The only caveat is if the car feels like it isn’t running smoothly. In this situation, you should avoid driving your vehicle. If your car’s check engine light is flashing, don’t drive it.
How long can you ignore check engine light?
The dreaded check engine light. Now, it wasn’t flashing, which I knew meant the problem was urgent. But how bad was the news going to be? A new study found that the average person will wait 9 days after seeing that light pop on before taking their vehicle in to see what is wrong.