AutoCodes.com | All About OBDII Engine Codes
AutoCodes - GMC - C0665 GMC

C0665 GMC Code - Level Control Compressor Relay Malfunction

- Code Popularity: 688 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC C0665 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Level Control Compressor Relay
  • Level Control Compressor Relay harness is open or shorted
  • Level Control Compressor Relay circuit poor electrical connection
⚠ Does your GMC have Safety Recalls? → Check here

How to Fix the DTC C0665 GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for C0665 GMC Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0665 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C0665 GMC Description

The Electronic Suspension Control (ESC) module monitors a lift/dive signal at the Powertrain Control Module (PCM). Under normal conditions, the ESC module supplies a 5-volt reference voltage to the PCM. The PCM grounds this circuit when the vehicle is accelerating rapidly (LIFT) or braking hard (DIVE). When the lift/dive signal goes low (approximately 0-volts), the ESC module commands all four ESC dampers to a FIRM condition.

OBDII Code C0665 GMC - Level Control Compressor Relay Malfunction - AutoCodes.com
C0665 GMC Code - Level Control Compressor Relay Malfunction

Need More Information on the Code?

Need more information on how to fix the C0665 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0665 GMC code diagnosed by a professional: Find a repair shop in your area

Code C0665 GMC comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the C0665 GMC code? Have you replaced any parts?
Any information is appreciated. Thanks