P1402 MERCEDES-BENZ Exhaust Gas Recirculation Open-Loop Control

Possible causes
– The EGR volume control valve circuit harness is open or shorted
– EGR volume control valve leaking or stuck open
– Faulty EGR temperature sensor
Tech description
Start by cleaning the EGR valve, if the code persist it may be necessary to replaced the EGR Valve
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)