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.

2003 Cadillac CTS StandardFACTORY OEM SERVICE PROCEDURE

Throttle Position (TP) Sensor

NOTE: TP sensor is not adjustable. For further testing procedures, perform TP sensor related diagnostic test. See appropriate SELF-DIAGNOSTICS article.

TP SENSOR VOLTAGE SPECIFICATIONS

Application

⁽¹⁾ Specification

3.2L

⁽²⁾

4.6L

⁽³⁾

⁽¹⁾	Range is from idle to wide open throttle.

⁽²⁾	No specification available from manufacturer. TP sensor is 2 individual units within one housing. TP sensor 1 signal voltage increases as the throttle opens. TP sensor 2 signal voltage decreases as the throttle opens.

⁽³⁾	No specification available from manufacturer. The scan tool range is 0-100 percent (throttle angle) and 0-5 volts (throttle position). These parameters indicates the throttle angle and position calculated by the powertrain control module (PCM) from the throttle position sensor voltage inputs.

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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.