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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 199 (ENGINE CONTROLS - SERVICE & ADJUSTMENT SPECIFICATIONS)FUEL SYSTEMSTHROTTLE POSITION (TP) SENSOR

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Throttle Position (TP) Sensor

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Throttle Position (TP) Sensor

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, 2003 Buick Regal, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

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⁾ Volts

3.1L & 3.4L

⁽²⁾

3.8L

⁽³⁾

⁽¹⁾	Voltage range is from idle to wide open throttle.

⁽²⁾	Voltage range is from less than one volt at closed throttle to greater than 4 volts at wide open throttle. Scan tool range is 0-100 percent or 0.00-5.00 volts.

⁽³⁾	Throttle position (TP) angle is computed by the powertrain control module (PCM) from the TP sensor voltage. TP angle should display zero percent at idle and 100 percent at wide open throttle or 0.00-5.00 volts.

RENDER: 1.0x

NO RELATED

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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.