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P0401 — EGR Flow Insufficient Detected

Severity: Medium

Drive Advice:
Diagnostic needed. Avoid long driving if severe symptoms, flashing CEL, overheating or power loss.

Repair Cost: $50.00 — $1500.00
Repair Time: 20 — 240 minutes
Emissions / Smog: May Fail

Common Symptoms

  • Check engine light
  • Reduced performance
  • Poor fuel economy

    • Common Causes

  • Sensor issue
  • Wiring problem
  • Mechanical fault

    • Diagnostic Order

  • Scan codes
  • Inspect wiring
  • Test sensors
  • Inspect mechanical components

    • Tools Required

  • OBD2 scanner
  • Multimeter
  • Basic socket set

    • Brand Specific Notes

    Important Disclaimer

    Diagnostic results are informational only. Severity depends on vehicle condition and other fault codes.