With an obd2.
Check engine light code reader.
The most common obd ii codes are p0 powertrain codes which are linked below on this page along with p2 generic p3.
Your check engine light is illuminated when a fault is detected with one of your vehicle s monitored systems.
The scanner allows you to communicate with the computer.
In order to find out the reason the light is illuminated you need to read the codes through the obd port.
If your check engine light is on you may have a serious problem.
The simplest way to reset the check engine light is with an obd2 scanner.
Here are some different ways how you can reset your check engine light.
If it turns out that your code isn t serious this device can turn off that annoying check engine light.
If you are near one of the major chains they can usually provide you with a printout of what the obd reading says on your vehicle.
No other battery or charger is required as it powers up through that link.
However if your vehicle was manufactured before 1996 you can simply disconnect the battery to reset the light.
These tools can take the guesswork out of reading and clearing check engine light codes on most models.
Using a code scanner.
When the computer determines that something has gone wrong it logs a diagnostic trouble code and turns on the check engine light letting you know that you can scan for the code with your code reader.
Scan your codes and follow the chart to determine what the code means.
Full list of obd ii diagnostic trouble codes.
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Inserting and reading an obd scanner.
Check engine light trouble codes for old and new cars and trucks.
Some vehicle specific codes.
Obd ii check engine light trouble codes.
You will need an obd scan tool.
Obd scanners and code readers pull trouble codes from the vehicle s computer to help determine what may have caused the light to come on.
The best way to reset a check engine light is to use a code scanner.
But if you do not have one available you can often do it without one.
For more information on what obd codes are obd ii codes explained explanation of fuel trims or answers to other questions visit our faq area.
It is a pain if the check engine light comes and you are short on cash or a code reader.
It s still recommended to check the trouble codes first with an obd2 scanner if the check engine light is on.
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