Mercedes Benz

P0225 M16/4 (Rear throttle valve actuator) : Actual value potentiometer 1 or 2 has failed. (P0225) Possible cause: ­ M16/4 (Rear throttle valve actuator) Affected functions: ­ ­ Engine diagnosis Engine output ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ Test 1: Check component M16/4 (Rear throttle valve actuator). 1. Check component M16/4 (Rear throttle valve actuator). Test 1.1: Check component M16/4 (Rear throttle valve actuator) using actual value. Test 1.2: Check component M16/4 (Rear throttle valve actuator) by means of actuation. Test 1.3: Check internal resistance of component M16/4m1 (Actuator motor). Test 1.4: Test voltage supply of the potentiometers of component M16/4 (Rear throttle valve actuator). 1.1. Check component M16/4 (Rear throttle valve actuator) using actual value. Test prerequisite ­ Switch ignition on and wait at least for 60 s. ­ Engine not running Status of the relevant actual values: ­ M16/4 (Rear throttle valve actuator) : Voltage ...