to check the codes get the ecu, on the opposite side of the pinouts there is a red led, next to it a dial. Get a tiny philips head screwdriver and, with the key in the ON position(not running) turn the dial all the way to the right..wait a second turn it all the way back to the left. Lights should blink. The first digit will be really slow, the second, really fast. Record it and report back here what it says..