The check engine light can come on for varies reasons, and it could be a minor or major problem, If it comes on while driving, don’t panic. Pay attention to how your vehicle is behaving. … If nothing seems to be acting strange, then it is probably safe to drive it until you can get it into a mechanic.
Can a check engine light mean nothing?
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.
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.
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.
Does your check engine light have to be on to get a diagnostic?
In short, yes; it’s possible to diagnose a problem with a vehicle even if the check engine light does not illuminate.
Is it OK to drive with check engine light on?
Can you drive a car with the engine light on? It’s okay to drive for a few miles, but be sure to schedule an inspection of the engine as soon as possible. If the check engine light comes on while you’re driving, don’t panic! … Just be sure to have your car inspected as soon as possible after the light turns on.
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.
When should I be worried about check engine light?
Unlike a Temperature or Oil Pressure light, a Check Engine light is usually not an urgent, “Stop right now or you may cause permanent damage!” type of situation, unless it is flashing. … If your gas cap is loose or the seal is not tight, the vapor leakage can cause your fuel system to trigger the check engine light.
What can throw a check engine light?
The Top 5 Reasons Your Check Engine Light May Be On
- It’s Time To Replace Your Oxygen Sensor. Oxygen sensors are a common cause of “check engine” lights. …
- Your Gas Cap Is Loose Or Faulty. …
- Your Catalytic Converter Is Failing. …
- Mass Airflow Sensor Needs Replacement. …
- Faulty Spark Plugs.
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.
Will check engine light come back on after reset?
When you reset your computer’s memory, the warning light will turn off. However, if there’s a problem, the light will come back on as soon as the computer runs the test that caused the light in the first place.
How much does it cost to check engine light?
On average, the fee to have an auto mechanic diagnose a check engine light is $100.
What does a yellow check engine light mean?
Look for a serious problem that requires immediate attention. Check your dashboard gauges and lights for indications of low oil pressure or overheating. … On some cars, a yellow check engine light means investigate the problem and a red one means stop right now. Try tightening your gas cap.