The CEL or check engine light covers engine problems that do not have other warning lights. Arthur’s Automotive can run a diagnostic test to find out why your check engine light is on. You may not know this but the check engine light was tested in 2019 to see how effective it is and reporting engine errors. The light passed the test with flying colors. Therefore, it’s crucial that you take a CEL warning seriously.
Catalytic Converter
One exhaust system part that can cause a check engine warning is the catalytic converter. If it gets clogged, the exhaust will back up into the combustion chamber. This can create problems with engine performance and cause system sensors to report error codes to the engine control unit.
EVAP Control System
The EVAP control system is installed in your vehicle to make sure that the gasoline or diesel fuel never evaporates out of it. If this system malfunctions, you will end up with a CEL warning and engine performance problems. Even a loose gas cap can turn on the check engine light.
Engine Control Unit
We mentioned above that the engine control unit turns on the CEL. This is because this unit is your vehicle’s main computer chip. In fact, it will even turn on the check engine light if it is malfunctioning. Aside from the warning, your engine will also stop running.
Mass Airflow Sensor
The mass airflow or MAF sensor can also trigger a check engine warning if it malfunctions or gets too dirty. Aside from the illuminated dashboard light, you will start to have engine performance problems. Unfortunately, these problems will reduce your vehicle’s fuel economy.
Oxygen Sensor
The same is true with the oxygen sensor, which is another exhaust system part. Also called the O2 sensor, this sensor can malfunction at about 100,000 miles. When it goes bad, it will alert the engine control unit that it is having problems and the unit will turn on the CEL.
Transmission
It seems as if the transmission should have its own warning light, doesn’t it? Unfortunately, it does not, so the engine control unit turns on the check engine light on the transmission is malfunctioning. You may also notice problems with the gear shifting in your automobile.
Arthur’s Automotive has two locations in Portland, OR. Our first location is on NE 80th Avenue. The second is on SE Stark Street. Call the shop that is closest to you today to set up a service appointment for a diagnostic test if your CEL is on.