What do the three numbers on a check engine light mean?
The third number in the sequence refers to the system that is affected: A “1” indicates a fuel or air metering system problem, such as an issue with the mass air flow sensor. A “2” refers to fuel or air metering injection system issues, such as a fuel injector problem. A “3” indicates an ignition-related problem, such as an engine misfire.
Where do you find the SAE code on a check engine light?
This is indicated by the first number in the sequence, immediately after the letter. SAE codes are generic codes that apply to all makes and models. SAE codes are indicated with a “0” as the second digit. Manufacturer-specific codes use a number other than “0” as the second digit.
What should I do if my check engine light keeps showing up?
However, it can be really difficult to know which problem is causing the check engine light is showing up for without a diagnostic scanner. Modern cars have an onboard computer that diagnoses car problems. If you have fixed the problem, but the light persists, you will need a scan tool like OBD reader.
How to read and understand check engine light ( OBD )?
You will need an OBD scan tool. The scanner allows you to communicate with the computer and retrieve the trouble codes. Certain scanners may give information on what the revealed code means, but most will just give a five digit number and letter combination. Follow these 4 steps to insert and read the OBD scanner:
Where can I find the code on my Check Engine light?
Do-it-yourselfers can buy inexpensive code readers from an auto parts store or online that connect to the onboard diagnostics (OBD) port and search for the code’s meaning on websites such as Engine Light Help. Modern systems will display the code in an app on your smartphone.
What does the ECM do on a car?
The ECM’s job is to keep your vehicle running at optimum efficiency while also minimizing emissions. Within the ECM is an onboard diagnostic system that is constantly evaluating the electronic sensors and emission control systems, including the catalytic converter.
How much does a check engine light cost?
With the cost of a shop performing a diagnosis costing around $90, many car owners are turning to the internet to find the cause and remedy. This can work in some instances, but when in doubt, seek professional help. If the check engine light illuminates, it will either blink or remain constantly illuminated, depending on the problem.