P0646 - Air Conditioning Clutch Relay Circuit Low

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P0646 Possible Causes

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

How do I fix code P0646?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P0646 code

Labor: 1.0

The cost of diagnosing the P0646 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

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 More Information

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