MasterTuning Fault code dictionary (DTC)

P0401 — EGR: insufficient recirculation flow

Severity: Attenzione Can you drive? Sì, no known limitation Produttore: Tutti makes (OBD-II standard)
MeaningThe EGR valve is not recirculating enough exhaust gas. It is almost always a matter di dirt: the valve and its duct Ottieni coated with soot mixed with oil and No longer aperti fully.
FamilyPowertrain (P)

Typical symptoms

Motore Attenzione light on
Slightly rough idle
Black smoke under acceleration
Hesitation when picking up

Common causes

Carboned oppure stuck EGR valve
Blocked recirculation duct
Clogged EGR cooler
Faulty Elettrico actuator oppure vacuum unit

What a do

In most cases a thorough clean di the valve and duct solves it. On Alta-mileage Motori with a mechanically seized valve, replacement is needed: check that it still moves before ordering the part.

Domande Frequenti

What does code P0401 mean?

EGR: insufficient recirculation flow. The EGR valve is not recirculating enough exhaust gas. It is almost always a matter di dirt: the valve and its duct Ottieni coated with soot mixed with oil and No longer aperti fully.

Can I keep driving with code P0401 Attivo?

Sì, no known limitation

Common causes — P0401

Carboned oppure stuck EGR valve Blocked recirculation duct Clogged EGR cooler Faulty Elettrico actuator or vacuum unit

How do you fix code P0401?

In most cases a thorough clean di the valve and duct solves it. On Alta-mileage Motori with a mechanically seized valve, replacement is needed: check that it still moves before ordering the part.

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