P0402Średni
Układ EGR — nadmierny przepływ
Układ napędowy
Sprawdź szczegóły →P0401
ŚredniExhaust Gas Recirculation (EGR) — Insufficient Flow
OBD-II (EN): Exhaust Gas Recirculation Flow Insufficient Detected
Code P0401 — Exhaust Gas Recirculation (EGR) — Insufficient Flow. Symptoms: engine knocking under load. Possible cause: clogged EGR valve. Professional diagnosis recommended.
Symptoms
Engine knocking under load, increased NOx
Possible causes
Clogged EGR valve, blocked EGR passage, faulty EGR position sensor
Affected systems
Related codes
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Tags and synonyms
Does code P0401 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.