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P0402 — EGR Flow Excessive

Too much exhaust gas being recirculated. EGR valve may be stuck open.

Severity: MediumRepair: $100-$400Difficulty: Medium

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Common symptoms of P0402

Common causes of P0402

Repair cost & difficulty

Typical cost to fix P0402: $100-$400 · Difficulty: Medium

Pro tip: If engine is stalling at idle, EGR is likely stuck open. Tap the valve body to free a stuck pintle temporarily.

Vehicles commonly affected

All makes

Related trouble codes

P0400P0401

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.