The on board diagnostics require some power to save the memory of the fault codes it s picking up to trigger the check engine light.
Advance auto parts clear check engine light.
Napa advance auto autozone and o reilly s will scan your vehicle and tell you the p codes for no charge at all.
Mil not requested since last key cycle pass since dtcs.
When the mil is illuminated getting to the engine codes themselves is a simple process.
I bought my car 2 weeks ago and the check engine light keeps coming on.
Any of the major parts stores in the country such as.
I took it to get a diagnosis test done and it read wheel speed sensor frequency malfunction.
A tech can connect a diagnostic code reader or scanner device to a port in the passenger compartment often under the steering column and the engine codes will show up on the scanner usually showing the code itself and a one line definition.
Disconnect the car battery.
Advance auto parts team members provide a variety of free services for customers such as check engine light scanning wiper blade installation battery testing and installation oil recycling and more.