P0646 - Air Conditioning Clutch Relay Circuit Low

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3   
Comments  |  Add Comment

Possible causes

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

When is the code detected?

Code P0646 may be stored if an open or short exists in A/C clutch relay control circuit.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0646 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.
OBDII Code P0646 - Air Conditioning Clutch Relay Circuit Low - AutoCodes.com

P0646 Information for specific makes

Need more help?

Get the P0646 code diagnosed by a professional: Find a repair shop in your area

Related Information

P0646 Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0646 code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧