P0401 Mitsubishi Exhaust Gas Recirculation Flow Insufficient Detected

Possible causes

– EGR solenoid valve harness is open or shorted
– EGR solenoid valve circuit poor electrical connection
– EGR volume control valve stuck closed
– Dead (Weak) battery
– Faulty EGR temperature sensor and circuit
– Faulty EGR Valve
– EGR passage clogged
– Exhaust gas leaks

Tech description

EGR flow malfunction could be caused by a clogged EGR valve or EGR tube. Before replacing any parts try cleaning the EGR valve, tube and passages.

What about the obd code?

– Low EGR flow control is detected

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Possible engine hesitation

P0401 Mitsubishi Description

Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control