The engine control module (ECM) uses the data it collects from the sensors to manage the engine's operation. If the ECM detects a problem, it will turn on the check engine light to alert you.
Sputtering
A sputtering engine is most commonly caused by a lack of fuel or air to the air/fuel mixture. This can happen for various reasons:
- Fuel injector failure: If a fuel injector fails, it will not be able to deliver enough fuel to the engine, which can cause it to sputter.
- Clogged fuel filter: If the fuel filter is clogged, it will restrict the fuel supply to the engine, causing it to sputter.
- Vacuum leak: A vacuum leak can cause the engine to run lean because too much air enters the air/fuel mixture.
- Faulty spark plug or ignition coil: If a spark plug or ignition coil fails, it can prevent the spark from reaching the air/fuel mixture.
Possible Causes of Engine Light and Sputtering
- Lack of fuel or air to the air/fuel mixture
- Fuel injector failure
- Clogged fuel filter
- Vacuum leak
- Faulty spark plug or ignition coil
What to Do If Your Engine Light Is On and Your Car Is Sputtering
- Check the fuel level.
- Check the fuel filter.
- Check the air filter.
- Look for any vacuum leaks.
- Check the spark plugs and ignition coils.
- Have the car scanned for trouble codes.
If you have checked all of these things and your car is still sputtering, it is important to take it to a qualified mechanic for diagnosis and repairs.
