Yes, the engine control module, which is your vehicle’s main computer chip, turns on the check engine light to warn you of trouble in the engine or with a vehicle system that does not have a warning light of its own. Anderson Automotive can run a diagnostic test to find out why your check engine light is on. Here are common reasons for the dashboard check engine warning.
Catalytic Converter
The catalytic converter can get clogged by the very carbons that it treats before they are released in your vehicle’s exhaust. Unfortunately, when this happens, you might smell rotten eggs in the exhaust. Your check engine light will also turn on.
EVAP Control System
If your automobile is equipped with an EVAP control system, this system can malfunction and you will end up with the check engine warning as a result. Oftentimes, engine performance problems accompany the check engine warning when the EVAP control system fails.
Engine Control Module
As we mentioned in the introduction, the engine control module is your car, truck, or utility vehicle’s main computer chip. It, too, can malfunction, and when it does, the check engine light will turn on. Unfortunately, your engine will also stall and refuse to start.
Mass Airflow Sensor
Another thing that triggers a check engine warning is a faulty mass airflow sensor. When this sensor goes bad, you will not only see that shining light on your dashboard but also experience engine performance problems and a reduction in your vehicle’s fuel economy.
Oxygen Sensor
The same is true with the oxygen sensor. In today’s automobiles, the oxygen sensor can last up to 100,000 miles or more. After this part malfunctions, however, you will get a check engine warning on the dashboard.
Spark Plugs
In today’s automobiles, spark plugs can also last up to 100,000 miles. When they need to be changed, however, you will notice engine performance issues such as misfiring and your check engine light may turn on.
Transmission
The transmission does not have a light of its own, so the engine control module turns on the check engine light when the transmission is having problems. Examples of problems include slipping out of gear, grinding noises, and unresponsiveness.
Vacuum Leak
Finally, a leaking vacuum hose can turn on the check engine light. The reason why is that the vacuum pressure is filling the engine with air. This will also affect your vehicle’s performance, including the acceleration.
Anderson Automotive in Marion, IA, is the only shop you need for all of your automotive service and repairs. Call us today if your check engine light is on.