How much does it cost to fix P0402?

Typical repair cost is $100–$500.

P0402 — EGR Flow Excessive

Medium Severity · Emissions

OBD-II code P0402 means your vehicle's ECU detected: EGR Flow Excessive. 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–$500

Parts + labor, national average

Severity

Medium

Schedule repair soon

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Common Causes of P0402

EGR valve stuck open
Failed EGR solenoid

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How to Fix Code P0402

Test EGR valve for proper closing

Replace EGR valve/solenoid

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FAQ — Code P0402

What does OBD-II code P0402 mean?

P0402 means your vehicle's onboard computer detected: EGR Flow Excessive. This is a medium-severity code in the Emissions category.

How much does it cost to fix code P0402?

Typical repair cost for P0402 is $100–$500 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 P0402?

Code P0402 is generally safe for short trips, but have it diagnosed soon to prevent the problem from worsening.

What are the most common causes of P0402?

The most common causes are: EGR valve stuck open, Failed EGR solenoid. Always start with the cheapest diagnosis step before replacing parts.

Will code P0402 clear itself?

Code P0402 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 P0402 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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Related Emissions Codes

P0400Exhaust Gas Recirculation Flow Malfunction P0401EGR Flow Insufficient P0403EGR Control Circuit Malfunction P0404EGR Control Circuit Range/Performance P0410Secondary Air Injection System Malfunction P0420Catalyst System Efficiency Below Threshold...

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.