already done the basics. swapped a oem one in there. looked for any air leaks cleaned maf and tb. idle relearn. still pops back up as soon as it runs the test. map and baro sensor reads within range of the chart. 5v ground and signal all look normal. book says possible coolent temp out of spec and cause it too, haven't been put meter on it, but looks normal in the scanner.
fuel trims are spot on at - /+3%.
code sets like clock work. blah. I did use it as can excuse to buy a smoke tester. but I don't expect to find anything. I sprayed brake cleaner all around which watching the fuel trims and nothing moved. usually seems to have many other codes with it, to just have the okd seems rare