The service engine light (SEL) is a warning light that illuminates when the engine control unit (ECU) detects a problem with the engine or emissions system. The SEL is typically a yellow or amber light, and it is located on the instrument cluster.
Why the Service Engine Light Comes On
The service engine light can come on for a variety of reasons, including:
* A faulty oxygen sensor
* A faulty spark plug or wire
* A faulty catalytic converter
* A faulty fuel injector
* A faulty exhaust gas recirculation (EGR) valve
* A faulty turbocharger or supercharger
* A faulty fuel pressure sensor
* A faulty mass air flow (MAF) sensor
* A faulty coolant temperature sensor
* A faulty oil pressure sensor
* A faulty transmission control module (TCM)
What to Do If the Service Engine Light Comes On
If the service engine light comes on, it is important to have your vehicle diagnosed by a qualified mechanic. The mechanic will be able to use a diagnostic scanner to identify the problem and recommend the necessary repairs.
Ignoring the Service Engine Light
Ignoring the service engine light can lead to serious problems, including:
* Engine damage
* Emissions problems
* Reduced fuel efficiency
* Poor performance
* Stalling
If you see the service engine light come on, it is important to have your vehicle diagnosed and repaired as soon as possible.
