Possible causes

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

Tech notes

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.

When is the code detected?

EGR flow control is not responding

Symptoms

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

P0400 CHRYSLER Description

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