1 Drive vehicle until it reaches operating temperature.
2 Stop the vehicle, place it in park or neutral and turn ignition OFF.
4 Turn on the ignition, close switch and wait for the Check Engine Light (CEL) to flash once. Immediately open the switch.
Note:To retrieve the next code, repeat the above instruction
5 Read codes as described in the Code Format Description below.
Note 2:If you receive code 13231 or 12231 (no ignition signal), crank engine and re-test. If code dissapears, disregard code.
6 Press the continue button to enter the code numbers and get the code description(s).