Who’s had these issues and did the speed sensor fix your misfire issues?

 

I sincerely doubt that the speed sensor would have anything to do with a misfire.

 

Connect an ODB2 scanner to your car and extract error codes and go from there. To fix misfire, you might have to use an injector treatment, for instance, Lukas.

 

I have already connected a reader, that’s why I put in the post that I have a Speed sensor fault ( left rear wheel) and misfires on #2 and #4. I was hoping to hear from people that have had this before, and if the speed sensor is fixed, cleaned, will the misfires go away, didn’t have any issues until Speed sensor fault showed up, and then a little later on the freeway, VSC, check engine light showed up. My questions are if the speed sensor can be cleaned, or could it be the wiring harness is bad and needs to be replaced. If replaced, cleaned, do I still need ignition coil packs for 2 & 4, because the spark plugs and tubes were replaced by Lexus dealer less than 8,000 miles ago. Any help is greatly appreciated!

 

You can swap the ignition coil packs with "working" (#1 and 3) ones and see, if the coils are the problem.