Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code 24, Vehicle Speed Sensor (VSS) SATURN (1991-92): Notes
Vehicle speed values are provided by vehicle speed sensor (VSS). Sensor is a permanent magnet (PM) generator mounted on differential areas of transmission converter housing. PM generator produces a pulsing voltage whenever vehicle speed above 3 MPH. These pulses occur 16 times per each revolution of differential housing and are translated to provide vehicle speed in miles per hour.
Code 24 will set if VSS indication is less than 1 MPH, engine speed is above idle, MAP indication is less tan .5 volts or vehicle is not in park or neutral.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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