Thread: Timing is getting retarded, running out of things to try

Originally Posted by Fivefingerdeathpunch

BUT, that test is only ran once per drive cycle. So during the one time 60-100 second test period it didnt switch the say (guessing here) 50 times and only did it 48, and it set the light off. But 3 minutes later while not testing it switched over 60 times in the same time period. It's a pretty common issue with modded exhaust and placement of the front o2 sensor. The sensor still works like normal and can read like normal but sometimes it can just be a tad slow.

I've had brand new denso sensors read these codes and over time they just went away.

I agree with what you say here, but I would still check the function of the closed-loop O2 sensor system. A quick peek with the scanner should tell you if the mixture is ok, or if you're running way lean, or way rich.