Note On Intermittents

WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.

Check for Electromagnetic Interference (EMI) induced on circuits No. 400 and 401 by running them close to spark plug wires or high power transmitters (like mobile radios) operating in vicinity.

Fig 1: Code P024 Schematic, Vehicle Speed Sensor (VSS) Circuit Problem

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P024 Diagnostic Flow Chart, VSS Circuit Problem

Courtesy of GENERAL MOTORS CORP.