How much does it cost to fix P0203?

Typical repair cost is $100–$600.

P0203 — Injector Circuit Malfunction — Cylinder 3

High Severity · Engine

OBD-II code P0203 means your vehicle's ECU detected: Injector Circuit Malfunction — Cylinder 3. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

High severity — do not ignore. Get a diagnosis promptly to avoid further engine damage.

Typical Repair Cost

$100–$600

Parts + labor, national average

Severity

High

Address as soon as possible

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Common Causes of P0203

Failed injector #3
Wiring

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How to Fix Code P0203

Test injector #3

Check wiring

Replace injector

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FAQ — Code P0203

What does OBD-II code P0203 mean?

P0203 means your vehicle's onboard computer detected: Injector Circuit Malfunction — Cylinder 3. This is a high-severity code in the Engine category.

How much does it cost to fix code P0203?

Typical repair cost for P0203 is $100–$600 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 P0203?

Code P0203 is high severity. Avoid long drives until diagnosed — continued driving can cause additional engine damage.

What are the most common causes of P0203?

The most common causes are: Failed injector #3, Wiring. Always start with the cheapest diagnosis step before replacing parts.

Will code P0203 clear itself?

Code P0203 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 P0203 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.