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.

1993 Geo Storm Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Throttle Position (TP) Sensor: Inspection

NOTE: Perform all testing procedures with engine at normal operating temperature.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application

Ohms

Storm

⁽¹⁾

⁽¹⁾	Sensor is not adjustable. Apply 5 volts to Blue/Orange wire terminal. With Black/White wire or Black wire grounded, voltage at Blue/Red wire or Yellow/Blue wire should be less than 1.25 volts at idle and about 5 volts at wide open throttle.

Factory Service Tools

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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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