Skip to content

Exhaust Gas Recirculation Flow Insufficient Detected

Verified1 source
1 source
  • Official data (NHTSA)official_feed

What P0401 means

Caution — monitor closely

Less EGR flow is occurring than the system commands.

Driveability assessment not yet available. Get a personalized AI Second Opinion for your exact car.

General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.

Common causes

  • Exhaust Gas Recirculation Flow Insufficient Detected

What to check first

  1. Inspect EGR passages for carbon blockage
  2. Test EGR valve actuation
Cost data coming soonUpload your estimate to check if the price is fair
Was this page helpful?