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…

P0475 MERCEDES-BENZ Exhaust Pressure Control Valve Malfunction

Possible causes – Faulty Exhaust Back Pressure Valve– Exhaust Back Pressure Valve harness is open or shorted– Exhaust Back Pressure Valve circuit poor electrical connection When is the obd code mean? Problems with either the Exhaust Back Pressure (EBP) Device or the tube between the exhaust manifold and the EBP sensor can be detected during…

P1031 MERCEDES-BENZ Heated Oxygen Sensor Malfunction

Possible causes – Faulty Heated Oxygen Sensor– Heated Oxygen Sensor harness is open or shorted– Heated Oxygen Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1031 MERCEDES-BENZ OBD Code Description Heated Oxygen Sensor (HO2S)

P0100 MERCEDES-BENZ Mass Air Flow Sensor

Possible causes – Faulty mass air flow sensor– Intake air leaks– Dirty mass air flow sensor– Dirty mass air filter– Mass air flow sensor harness is open or shorted– Mass air flow sensor circuit poor electrical connection Tech description Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air…