AutoCodes – Chevrolet – C0662 Chevrolet

C0662 Chevrolet 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 Chevrolet 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 1,033

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

What does this mean?

What are the Possible Causes of the DTC C0662 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 C0662 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 C0662 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 C0662 Chevrolet code?

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

Need Help with the Code?

Get the C0662 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 C0662 Chevrolet Code

1. What does the OBDII code C0662 mean on a Chevrolet?

C0662 indicates a problem with the level control exhaust valve circuit, specifically that the circuit voltage is lower than expected.

2. What are the common symptoms of code C0662 in a Chevrolet?

Symptoms may include a suspension warning light, a harsh or uneven ride, and the air suspension not raising or lowering as intended.

3. What causes the C0662 code to appear on a Chevrolet?

Common causes include a faulty level control exhaust valve, damaged wiring or connectors, or issues with the air suspension control module.

4. Can I drive my Chevrolet with code C0662?

While the vehicle may still be drivable, the air suspension system may not function properly, leading to a less comfortable or stable ride.

5. How do I diagnose the C0662 code on a Chevrolet?

Diagnosis involves checking the exhaust valve circuit for proper voltage, inspecting wiring and connectors for damage, and testing the exhaust valve for functionality.

6. How do I fix the C0662 code on a Chevrolet?

Repairs may include replacing the level control exhaust valve, repairing damaged wiring or connectors, or reprogramming or replacing the air suspension control module.

7. What tools are needed to troubleshoot the C0662 code?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and potentially a service manual for your Chevrolet model.

8. Can a blown fuse cause the C0662 code on a Chevrolet?

Yes, a blown fuse in the air suspension system circuit could cause the exhaust valve to receive insufficient power, triggering the code.

9. How much does it cost to repair code C0662 on a Chevrolet?

Repair costs vary, but replacing the exhaust valve can range from $150 to $400, plus labor. Additional costs may apply if wiring or control module repairs are needed.

10. Can the C0662 code clear itself on a Chevrolet?

The code may clear temporarily if the fault is intermittent, but it will return if the underlying issue is not addressed.