AutoCodes – GMC – C0693 GMC

C0693 GMC Code - Damper Control Relay Circuit High

Quick Answer

Battery voltage for the strut actuators is supplied to the Electronic Suspension Control (ESC) module through the damper drive relay circuit. Common causes include Faulty Damper Control Relay, Damper Control Relay harness is open or shorted, Damper Control Relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C0693 GMC indicates Damper Control Relay Circuit High.
Common causes: Common causes include Faulty Damper Control Relay, Damper Control Relay harness is open or shorted, Damper Control Relay circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 820

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0693 GMC Description

Battery voltage for the strut actuators is supplied to the Electronic Suspension Control (ESC) module through the damper drive relay circuit. The ESC module energizes the damper relay by opening and closing an internal ground for the damping relay coil control circuit. The ESC module monitors the damper drive relay circuit and each strut actuator high-side and low-side drive circuits for fault conditions.

OBDII Code C0693 GMC - Damper Control Relay Circuit High - AutoCodes.com — C0693 GMC Code - Damper Control Relay Circuit High

What does this mean?

What are the Possible Causes of the DTC C0693 GMC?

Faulty Damper Control Relay
Damper Control Relay harness is open or shorted
Damper Control Relay circuit poor electrical connection

How to Fix the DTC C0693 GMC?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0693 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C0693 GMC code?

Need more information on how to fix the C0693 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0693 GMC code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C0693 GMC Code

1. What are common symptoms of OBDII code C0693 GMC (Damper Control Relay Circuit High)?

- Common symptoms include the HVAC system not working properly, lack of heating or cooling, and potential issues with temperature control.

2. What causes OBDII code C0693 GMC to trigger?

- This code is typically triggered by a malfunction in the damper control relay circuit, causing it to operate at a higher voltage than normal.

3. How can I diagnose the cause of OBDII code C0693 GMC?

- Use a diagnostic scanner to read the code and perform a visual inspection of the damper control relay and associated wiring for any signs of damage or loose connections.

4. Can a faulty damper control relay be repaired, or does it need to be replaced?

- In most cases, a faulty damper control relay will need to be replaced rather than repaired to ensure proper functionality of the HVAC system.

5. Are there any DIY repair tips for addressing OBDII code C0693 GMC?

- DIY repair tips include checking and cleaning the connections to the damper control relay, ensuring proper voltage supply, and replacing the relay if necessary.

6. Is it safe to continue driving with OBDII code C0693 GMC present?

- It is not recommended to continue driving with this code present, as it can lead to further HVAC system issues and discomfort while driving.

7. How much does it typically cost to repair OBDII code C0693 GMC at a mechanic or dealership?

- Repair costs for OBDII code C0693 GMC can vary depending on the extent of the issue, but typically range from $100 to $300 for parts and labor.

8. Can resetting the OBDII system clear OBDII code C0693 GMC permanently?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue with the damper control relay circuit is not addressed, the code is likely to return.

9. What are the long-term effects of ignoring OBDII code C0693 GMC?

- Ignoring this code can lead to continued HVAC system malfunctions, reduced comfort in the vehicle, and potentially more costly repairs in the future.

10. Is OBDII code C0693 GMC specific to certain GMC models?

- OBDII code C0693 GMC (Damper Control Relay Circuit High) is specific to certain GMC models equipped with an OBDII system and HVAC controls.