AutoCodes – Cadillac – C0662 Cadillac

C0662 Cadillac Code - Level Control Exhaust Valve Circuit Low

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: C0662 Cadillac indicates Level Control Exhaust Valve Circuit Low.
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 3,539

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 C0662 Cadillac 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 C0662 Cadillac - Level Control Exhaust Valve Circuit Low - AutoCodes.com — C0662 Cadillac Code - Level Control Exhaust Valve Circuit Low

What does this mean?

What are the Possible Causes of the DTC C0662 Cadillac?

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 C0662 Cadillac?

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 C0662 Cadillac 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 C0662 Cadillac code?

Need more information on how to fix the C0662 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0662 Cadillac 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 C0662 Cadillac Code

1. What are the common symptoms of OBDII code C0662 in a Cadillac related to the Level Control Exhaust Valve Circuit Low?

The common symptoms include reduced ride quality, uneven suspension height, and an illuminated warning light on the dashboard.

2. What are the possible causes of the Level Control Exhaust Valve Circuit Low code in a Cadillac?

Possible causes may include a faulty exhaust valve, damaged wiring or connectors, a problem with the level control module, or an issue with the vehicle's suspension system.

3. How can I diagnose the cause of the C0662 code in my Cadillac?

Diagnosing the C0662 code typically involves conducting a visual inspection of the wiring and connectors, testing the exhaust valve for proper operation, and using a scan tool to check the level control module for any faults.

4. Can I still drive my Cadillac with the C0662 code present?

It is not recommended to drive your Cadillac with the C0662 code present, as it can affect the vehicle's suspension system and potentially lead to further damage if left unresolved.

5. How can I repair the Level Control Exhaust Valve Circuit Low issue in my Cadillac?

Repairing the C0662 code may involve replacing the faulty exhaust valve, repairing damaged wiring or connectors, resetting the level control module, or addressing any underlying suspension issues.

6. Is it possible to reset the C0662 code in a Cadillac without fixing the underlying issue?

While you can clear the code temporarily with a scan tool, it is crucial to address the underlying issue causing the C0662 code to prevent it from reoccurring.

7. Will the C0662 code cause any long-term damage to my Cadillac if left untreated?

Leaving the C0662 code untreated can potentially cause further damage to the vehicle's suspension system, leading to increased repair costs over time.

8. Can I fix the Level Control Exhaust Valve Circuit Low code in my Cadillac by myself, or do I need professional help?

While some DIY enthusiasts may be able to diagnose and repair the C0662 code, it is recommended to seek professional help, especially if you are not familiar with automotive electrical systems.

9. Are there any preventive measures I can take to avoid the C0662 code in my Cadillac?

Regularly inspecting the suspension system, maintaining proper vehicle alignment, and addressing any suspension issues promptly can help prevent the occurrence of the C0662 code in your Cadillac.

10. How long does it typically take to repair the Level Control Exhaust Valve Circuit Low issue in a Cadillac?

The repair time for the C0662 code can vary depending on the exact cause of the issue and the extent of the repairs needed. It is best to consult a professional technician for an accurate estimate.