Hello everyone, I’m new here to the forums as I got my 2006 ap2 about a month ago. I’ve been trouble shooting an issue I’ve been having since I got the car. I was driving it home from the purchase when it started acting up, idling rough and really being laggy with acceleration. The CEL light is on, the VSA light is on, and as I was parking the car the CEL started to blink (facccckkkkk). As you can imagine, this was not how I wanted my first day to be with this car.

Im getting thrown three codes. The first is (p0135) an o2 sensor for bank one sensor one. The second is (p0301) cylinder 1 misfire. The third code is a knock sensor code which is p0325.

What I’ve done so far. I’ve replaced the spark plugs, coil packs, valve cover seals, replaced the old gas with new just in case (which stopped the cel from blinking), and last I just sent the injectors to be cleaned at RC Injectors. I got the injectors back which really needed to be cleaned, and while it idles a little smoother, the CEL started blinking again after driving and I came back to the same three codes.

My real question is can the o2 sensor being faulty really cause all three codes? It’s the last thing on my list to try. I’m doing it in the morning but I just have this feeling it’s not the answer. Anyone else have any input? She still idles a little rough and isn’t as responsive as it should be.

 

You said you replaced the valve cover gasket but did you check the valve clearances? they may need to be adjusted.

 

Maybe some clues here:

https://www.s2ki.com/forums/s2000-se...-p2a00-782246/

-- Chuck