P0646 BMW – Air Conditioning Clutch Relay Circuit Low

P0646 BMW Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0646 BMW Possible Causes

Faulty Air Conditioning Clutch Relay,Air Conditioning Clutch Relay harness is open or shorted,Air Conditioning Clutch Relay circuit poor electrical connection

P0646 BMW Description

A/C clutch relay may also be referred to as A/C compressor clutch relay. A/C clutch relay circuit is monitored when ignition is on and battery voltage is greater than 10.4 volts.