if you want to check code on cel connect the two black wires under steering colum then turn ignition to on. This falshes the code in a kinda morse. Either that or the green ones, but this pulsed my radiator fan?. Any way the long pulses indicate first digit. ie if theres two long flashes thats number 2. Then short pulses are second number. ie if theres five short flashes thats number 5. Then you end up with code 25. you can have more than one code aswell. Did this with my legacy when she never started from hot sometimes. sandpapered relevant sensors and started all the time. Found this off the web sometime ago.