OBD Code P0646

A/C Clutch Relay Control Circuit Low

What’s mean?

OBD2 Code P0646 Definition:
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.

Symptoms

Possible sumptoms of P0646
– Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

Possible causes of P0646
– Open or short air condition clutch relay circuit – Poor air condition clutch relay electrical connection – Failed air condition clutch relay The Error code is generally activated on detection of the following conditions: Code P0646 may be stored if an open or short exists in A/C clutch relay control circuit.

Possible Solutions