P0790 MERCEDES-BENZ – Normal/Performance Switch Circuit Malfunction

P0790 MERCEDES-BENZ Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0790 MERCEDES-BENZ Possible Causes

Faulty Normal/Performance Switch,Normal/Performance Switch harness is open or shorted,Normal/Performance Switch circuit poor electrical connection

P0790 MERCEDES-BENZ Description

The Transmission Control Module (TCM) monitors the Normal/Performance Switch signal. The TCM sets the OBDII code when the Normal/Performance Switch is not to factory specifications.