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.
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HOMESERVICE MANUALSPONTIAC1994FIREBIRD TRANS AM GT, 2D COUPEREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 5.7LECM/PCM CODE CHARTSCODE 97, VSS OUTPUT CIRCUITNOTES
1994 Pontiac Firebird Trans Am GT, 2D Coupe
Code 97, VSS Output Circuit: Notes
1994 Pontiac Firebird Trans Am GT, 2D CoupeSECTION Notes
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Disable Traction Control (TC) system (if equipped) prior to this step. Switch is located in glove box. Whenever ignition is cycled off and then on, TC system will default to on. If vehicle speed is indicated at this point, code is intermittent.
- Use Jumper Harness (J 35616-A) to prevent damage to harness.
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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.