The engine control module turns on the check engine light when it receives an error code from a faulty part or system sensor. Crossroads Automotive can determine why your check engine light has come on by running a diagnostic test. The following auto parts can turn on the check engine light when they go bad. Aside from the check engine warning, there will be other signs of trouble, as well.
Catalytic Converter
The catalytic converter lasts about 10 years before it malfunctions. Once it does, you may end up with the check engine light warning and other problems. Signs the catalytic converter is bad include rotten egg odors, engine performance problems, and black exhaust.
EVAP Control System
The EVAP control system works tirelessly to ensure fuel never evaporates from your automobile into the environment. The gas cap also creates a seal over the gas tank to prevent fuel evaporation. A faulty EVAP control system can turn on the check engine light as can a loose fuel cap.
Engine Control Module
The engine control module is your car’s main computer chip. If it goes bad, your engine may stall. Unfortunately, you won’t be able to get the engine to restart until you replace the engine control module. The check engine light will turn on, as well.
Mass Airflow Sensor
The mass airflow sensor can cause an imbalance of air and fuel in the combustion chamber when it goes bad. This will create engine performance problems and a check engine warning. You may also notice a reduction in your vehicle’s fuel economy.
Oxygen Sensor
The oxygen sensor can also cause the problems listed above because it, too, can imbalance the air and fuel in the combustion chamber. The oxygen sensor has a lifespan of about 90,000 miles to 100,000 miles. It will begin to malfunction after that.
Spark Plugs
The spark plugs in your automobile will eventually get worn and start to misfire. When this happens, your check engine light will turn on and your engine will sputter and hiccup. It may also idle roughly and stall frequently.
Transmission
Finally, the transmission can turn on the check engine light if it is malfunctioning. Aside from the dashboard warning, there will be problems with the gear shifting, possibly strange noises such as grinding, and possibly shaking and vibration.
Call Crossroads Automotive in Topeka, KS, today to schedule a diagnostic test if your vehicle’s check engine light is on. Once we know what the problem is, we can tell you how we can fix it.