How much does it cost to fix P0121?

Typical repair cost is $100–$450.

P0121 — TPS Range/Performance Problem

Medium Severity · Engine

OBD-II code P0121 means your vehicle's ECU detected: TPS Range/Performance Problem. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

Drivable short-term but schedule a diagnosis soon. Prolonged driving can worsen the issue.

Typical Repair Cost

$100–$450

Parts + labor, national average

Severity

Medium

Schedule repair soon

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Common Causes of P0121

Worn TPS
Dirty throttle body

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How to Fix Code P0121

Clean throttle body

Replace TPS

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FAQ — Code P0121

What does OBD-II code P0121 mean?

P0121 means your vehicle's onboard computer detected: TPS Range/Performance Problem. This is a medium-severity code in the Engine category.

How much does it cost to fix code P0121?

Typical repair cost for P0121 is $100–$450 including parts and labor. Costs vary by vehicle make, model, and location. A free scan at AutoZone or O'Reilly is a good first step.

Can I drive my car with code P0121?

Code P0121 is generally safe for short trips, but have it diagnosed soon to prevent the problem from worsening.

What are the most common causes of P0121?

The most common causes are: Worn TPS, Dirty throttle body. Always start with the cheapest diagnosis step before replacing parts.

Will code P0121 clear itself?

Code P0121 will clear itself after the underlying issue is fixed and the ECU completes several successful drive cycles. Clearing it without fixing the root cause only masks the problem temporarily.

Is P0121 showing on your car?

Enter your VIN for a free vehicle-specific report — recalls, specs, and market value. No signup required.

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OBD-II code data is based on SAE J2012 standards and general repair industry data. Repair costs are national averages and vary by vehicle, location, and shop. Always consult a qualified mechanic for a diagnosis specific to your vehicle.