I have a cel on my 95 eclipse gs. I had to change ecus and after the change the cel came on. I checked the codes in the repair manual i have and the only code that was in it that i have is 36 (pulsed secondary air injection unit).The other codes are 12 and 52. The repair manual said that this code only applies to 95/manaul trans models. Can any one tell me what this is and how to check and repair this so the cel will go away?

Take it to the dealer, if I remember correctly they were supposed to do a fix on the '95 cars to get rid of the secondary pulsed air injection blah blah years ago.

Thank you very much for the information.