Pcm Code P024 - Vehicle Speed Sensor (VSS) Circuit Problem: Notes
WARNING: This page is about a different car, the 1993 Cadillac Seville and 1993 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
VSS is a permanent magnet pulse generator mounted in transaxle. PCM uses VSS input for TCC apply-and-release determinations, to select between RPM and throttle angle control of ISC, and as a test condition for many codes. PCM Code P024 sets when PCM detects zero MPH when engine RPM and TP sensor indicate that vehicle is moving.