A throttle position sensor (TPS) replacement typically costs about $100 to $350 in the United States, with higher prices possible for cars that require more extensive work or a full throttle-body replacement. Doing it yourself can reduce the cost by eliminating labor charges, but professional service is often recommended for proper installation and calibration.
The TPS measures how far the throttle is open and feeds that information to the engine control unit. When it fails, symptoms can include rough idle, poor acceleration, stalling, or a check engine light. Costs vary based on part price, labor rates, diagnostic fees, and whether related components must be replaced or the throttle body must be addressed.
Understanding the TPS and its role
The throttle position sensor is mounted on or inside the throttle body and communicates throttle opening to the engine computer. A faulty TPS can send incorrect signals, causing drivability issues or incorrect air-fuel mixture. Modern vehicles often require precise calibration or relearning procedures after replacement to ensure optimal performance.
What it does
It provides a variable voltage signal representing throttle angle, helping the ECU adjust fuel delivery and idle speed.
Common failure signs
Rough idle, hesitation or stalling, inconsistent acceleration, engine misfires, or the check engine light pointing to a sensor fault are typical symptoms.
Cost to replace a TPS
Costs break down into parts, labor, diagnostic fees, and any related work. The following ranges reflect typical figures in the United States as of 2024–2026.
- Parts cost
- Aftermarket TPS sensor: roughly $15–$60
- OEM (dealer) TPS sensor: roughly $60–$180
- If the TPS is integrated into the throttle body (some models): the part may be a throttle-body assembly, ranging from $300–$700 for the component itself
- Labor cost
- Labor time: about 0.5–1.5 hours for a straightforward sensor swap
- Shop labor rate: typically $75–$150 per hour
- Estimated labor total: roughly $40–$225
- Diagnostic and related charges
- Diagnostic fee to identify the TPS issue: $0–$100 (some shops waive if you proceed with repair)
- Additional components that may be replaced or inspected (gaskets, O-rings, cleaning): $5–$60
- Total typical cost for sensor replacement (not counting throttle-body replacement)
- Overall range: about $100–$350
- Higher-cost scenarios
- If the throttle body must be replaced or recalibrated, or if the sensor is not easily accessible, total costs can rise to roughly $400–$900 or more depending on the vehicle and labor rates
In short, most drivers pay a total in the ballpark of $100–$350 for a TPS sensor replacement, with higher costs if related throttle-body work is required or if OEM parts are specified.
DIY vs professional replacement
Replacing a TPS yourself can save labor costs, but it requires basic mechanical skill and the ability to perform a relearn/calibration procedure in some vehicles. If you’re considering DIY, weigh the potential savings against the risk of improper installation or missed diagnostics.
- DIY considerations
- Part cost: typically $15–$180 depending on aftermarket vs OEM
- Time and skill: 0.5–2 hours for a straightforward swap; longer if access is tight
- Calibration: some cars require a relearn procedure or code clearing with an OBD-II scanner
- Warranty: DIY work may affect manufacturer or part warranties
- What you’ll save
- Eliminates labor charges, which can account for $40–$225 of a typical job
For many drivers, a professional replacement provides assurance of proper fitment, calibration, and a clean diagnostic check, especially on newer or more complex vehicles.
What to know before you replace
Before committing to a TPS replacement, consider getting a diagnostic to confirm that the TPS is the root cause. Other issues—such as dirty throttle bodies, vacuum leaks, or faulty wiring—can mimic TPS symptoms and affect the final cost or the repair approach.
Summary
Replacing a TPS is usually a moderate-cost repair, with typical total bills ranging from about $100 to $350 for sensor-only replacements, and higher if the throttle body or related components must be addressed. Costs are driven by part prices (aftermarket vs OEM), labor rates, and whether calibration or additional work is needed. Evaluating your vehicle, your comfort with DIY, and obtaining multiple quotes can help you secure a fair price.