AutoCodes – Chevrolet – C0663 Chevrolet

C0663 Chevrolet Code - Level Control Exhaust Valve Circuit High

Quick Answer

The Automatic Level Control exhaust solenoid valve is switched ON or OFF by the Electronic Suspension Control (ESC) module. Common causes include Faulty Level Control Exhaust Valve, Level Control Exhaust Valve harness is open or shorted, Level Control Exhaust Valve 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: C0663 Chevrolet indicates Level Control Exhaust Valve Circuit High.
Common causes: Common causes include Faulty Level Control Exhaust Valve, Level Control Exhaust Valve harness is open or shorted, Level Control Exhaust Valve 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 991

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 C0663 Chevrolet Description

The Automatic Level Control exhaust solenoid valve is switched ON or OFF by the Electronic Suspension Control (ESC) module. The ESC module provides a ground whenever exhaust activity is required and during a head-relief sequence which occurs before each compressor start-up. This drive output from the ESC module is continually monitored to determine if the voltage level agrees with the commanded state.

OBDII Code C0663 Chevrolet - Level Control Exhaust Valve Circuit High - AutoCodes.com — C0663 Chevrolet Code - Level Control Exhaust Valve Circuit High

What does this mean?

What are the Possible Causes of the DTC C0663 Chevrolet?

Faulty Level Control Exhaust Valve
Level Control Exhaust Valve harness is open or shorted
Level Control Exhaust Valve circuit poor electrical connection

How to Fix the DTC C0663 Chevrolet?

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 C0663 Chevrolet 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 C0663 Chevrolet code?

Need more information on how to fix the C0663 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0663 Chevrolet 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 C0663 Chevrolet Code

1. What are the common symptoms of OBDII code C0663 in a Chevrolet related to the Level Control Exhaust Valve Circuit High?

The common symptoms include illuminated warning lights on the dashboard, a rough or bumpy ride, and issues with the vehicle's suspension system.

2. What are the possible causes of OBDII code C0663 in a Chevrolet indicating a Level Control Exhaust Valve Circuit High?

Possible causes may include a faulty exhaust valve, damaged wiring or connectors in the circuit, a malfunctioning level control module, or issues with the vehicle's suspension components.

3. How can I diagnose OBDII code C0663 in my Chevrolet related to the Level Control Exhaust Valve Circuit High?

Diagnosis involves using an OBDII scanner to retrieve the specific code, inspecting the exhaust valve and related components for damage, and testing the circuit for continuity and proper voltage.

4. Are there any quick repair tips for fixing OBDII code C0663 in a Chevrolet indicating a Level Control Exhaust Valve Circuit High?

Quick repair tips may include checking and repairing any damaged wiring or connectors, ensuring proper connection of the exhaust valve, and resetting the fault code to see if it reoccurs.

5. Can driving with OBDII code C0663 in a Chevrolet related to the Level Control Exhaust Valve Circuit High cause further damage?

Continuing to drive with this code may lead to further issues with the vehicle's suspension system and potentially worsen the ride quality and handling.

6. How much does it typically cost to repair OBDII code C0663 in a Chevrolet indicating a Level Control Exhaust Valve Circuit High?

The cost of repairs can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic services.

7. Is it safe to drive my Chevrolet with OBDII code C0663 showing a Level Control Exhaust Valve Circuit High?

It is not recommended to drive the vehicle with this code present, as it may affect the vehicle's performance and safety. It's best to address the issue promptly.

8. Can OBDII code C0663 in a Chevrolet indicating a Level Control Exhaust Valve Circuit High be reset without repairs?

While you can reset the fault code temporarily, it is important to diagnose and address the root cause to prevent the code from reappearing and causing further issues.

9. How long does it take to repair OBDII code C0663 in a Chevrolet related to the Level Control Exhaust Valve Circuit High?

The repair time can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a day for a mechanic to diagnose and fix the problem.

10. Will OBDII code C0663 in a Chevrolet reset on its own over time?

The code may clear on its own if the underlying issue is temporary, but it is recommended to diagnose and repair the problem to prevent potential complications and ensure the vehicle's proper functioning.