Possible causes
– Faulty Exhaust Gas Recirculation (EGR) valve
– Faulty Exhaust Gas Recirculation (EGR) valve solenoid
– Exhaust Gas Recirculation (EGR) valve carbon blockage
– Faulty Exhaust Gas Recirculation (EGR) valve solenoid
– Exhaust Gas Recirculation (EGR) valve carbon blockage
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
FORD Technical Service Bulletins for P1404 code
1999 FORD L SERIES ENGINE AND ENGINE COOLING:ENGINE
1999 FORD L SERIES ENGINE AND ENGINE COOLING:EXHAUST SYSTEM