Aos failure & more

[thstone]

Originally Posted by flouese

I replaced my AOS 15K miles ago. Now at startup I get a burst of white smoke, while at idle I have some smoke.
1. How long should an AOS last?
2. Am I experiencing AOS failure?
3. Would the P410 CEL code be a contributing factor to the white smoke and not AOS failure?

1. It should last 75K miles or more but there are a lot of reports of failures at much lower mileage.
2. Smoke at start up can be one indication that the AOS might be starting to go south, but it is impossible to know conclusively. Also, impossible to know when the final failure will occur - could be days or months or years.
3. Not likely but maybe. P0410 is a secondary air injection failure and the SAI only operates at start up so it could be contributing but the SAI addresses emission levels not smoke so that is why I say not likely.

Here is a good link for the P0410 code: https://www.renntech.org/forums/topic/39927-p0410-and-p1411-running-out-of-ideas/