A check engine light is often the first warning of a potential problem.
Check engine light code reader o reilly.
Doing so can lead to safety issues a roadside breakdown or costly repairs down the line.
Method 1 of 2.
Scan your codes and follow the chart to determine what the code means.
These tools can take the guesswork out of reading and clearing check engine light codes on most models.
No other battery or charger is required as it powers up through that link.
If your check engine light is on our professional parts people will scan the code for you and provide a list of possible fixes.
Since the 1980s many vehicles have been built to be run by the engine computer unit ecu which controls vehicle s drivetrain and auxiliary systems based on input from the vehicle s sensors this computer will make adjustments to your vehicle s performance to keep your ride running smoothly.
Whether you need a car code reader for mustang your toyota tacoma or a car code reader for honda accord we have your back.
Full list of obd ii diagnostic trouble codes.
The scanner comes with a 2 5 foot long well insulated cable that connects with your car s obdii data link connector.
Some vehicle specific codes.
Never ignore a warning light.
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.
The most common obd ii codes are p0 powertrain codes which are linked below on this page along with p2 generic p3.
Using a code scanner.
The best way to reset a check engine light is to use a code scanner.
Check engine light trouble codes for old and new cars and trucks.
Obd ii check engine light trouble codes.
This light is the centerpiece of your vehicle s on board diagnostics system obd.
O reilly auto parts offers free check engine light testing to help you diagnose the problem.
Some parts stores will scan your codes for free.
If your check engine light is on you may have a serious problem.
If it turns out that your code isn t serious this device can turn off that annoying check engine light.
However if your vehicle was manufactured before 1996 you can simply disconnect the battery to reset the light.
Most of our stores can loan you a code reader for obd 1 2 systems for vehicles from 1996 and up except in areas where it is prohibited by law.
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.
