chas8486

I have a '99' TA convertible, 6 spd (68K) that was recently overheating slightly, had the thermostat changed and a fill and flush done at the same time by a local shop. Shortly after leaving, the SES came on. Went to autozone and they diagnosed a PO410, PO412 and 418 (all secondary air related). Took it back to the shop and of course (it was nothing they did). The car runs fine except I have that annoying SES light on. This has continued after 4 cold starts. Disconnecting the negative battery terminal for 20 minutes didn't clear the code either. I swapped the relays, inspected the 25A fuse and they are ok. Has anyone else experienced this and is there anything else for me to look for? I really don't care about the emissions as we don't test for them here. Any and all advice is appreciated. Charlie