P1402 MERCEDES-BENZ - Exhaust Gas Recirculation Open-Loop Control
- The EGR volume control valve circuit harness is open or shorted
- EGR volume control valve leaking or stuck open
- Faulty EGR temperature sensor
Start by cleaning the EGR valve, if the code persist it may be necessary to replaced the EGR Valve
- Engine Light ON (or Service Engine Soon Warning Light)
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