Okay here's the deal. I replaced the knock sensor first, since that code came up, then the VSS code came up and I replaced the VSS. The light stayed off for a week then came back on with the same code! I reset the ECU and it stayed off for a few days then came on again with the same code yet again! This happen to anyone before? Did I get a bad VSS? I'm running out of ideas here and need some advice. Thanks.