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P0404 — EGR Circuit Range/Performance

EGR valve position sensor reading doesn't match what PCM commanded.

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

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Common symptoms of P0404

Common causes of P0404

Repair cost & difficulty

Typical cost to fix P0404: $100-$400 · Difficulty: Medium

Pro tip: On GM, carbon buildup on EGR pintle is extremely common. Cleaning or replacing the valve fixes this.

Vehicles commonly affected

All makes — common on GM

Related trouble codes

P0400P0401P0403

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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.