I'm having an idling problem and pulled codes 411 and 412 that I believe a new IAC will fix, but also had a 452 code which applies to the VSS. Speedo is working fine and so is overdrive and cruise and shifting is normal. Last week the speedo stopped working and the od was flashing and found a burnt fuse that fixed those problems. My truck is a 94 with 4R70 trans. Will replacing the VSS sensor in the rear diff clear the code?

 

Sometimes you can just pull it out and wipe the crap off it.
Some codes are triggered by other ones so if you can fix the idling issue then clear the codes and see if anything else comes back.

 

The burnt fuse could have made code 452 seeing how the VSS runs through the Speedo then to the PCM i'd just try to clear the code and see if it comes back. My VSS acted up and it messed with my shifting bad and my speedo would bounce around time to time.

 

Thanks for the response, but the problem is resolved. I should have posted a follow up, but the code cleared itself after the fuse replacement.