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Code C0606

Symptoms

• Uneven ride height

• Warning light on the dashboard

• Poor handling or ride comfort

Common Causes

• Faulty level control sensor

• Damaged wiring or connectors

• Faulty control module

Glossary

OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnosing and reporting.

Control Module: A computer in the vehicle that controls various functions and monitors sensors.

Related Codes

• C0607

• C0608

Laymans terms

This code means there's a problem with a sensor in your car that helps it know how high or low it is off the ground.

Explanation

The C0606 code indicates an issue with the Level Control Sensor Circuit.

Technical description

The C0606 code is triggered when the vehicle's control module detects a malfunction in the level control sensor circuit. This sensor is responsible for measuring the vehicle's ride height and ensuring the suspension system maintains the correct level.

Diagnosis steps

• Inspect the level control sensor and its connections.

• Check for damaged wiring or connectors.

• Test the control module for faults.

Repair procedures

• Replace the faulty level control sensor.

• Repair or replace damaged wiring or connectors.

• Replace or reprogram the control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Tahoe

• GMC Yukon

• Cadillac Escalade

Preventive measures

• Regularly inspect suspension components.

• Keep wiring and connectors clean and secure.

• Perform routine maintenance checks.

Error code type

Sensor Issue

User experience recommendations

• Do not ignore any warning lights.

• Have your suspension system checked regularly.

• Consult a professional mechanic if handling issues arise.

Warranty information

Check with your vehicle's manufacturer for specific warranty coverage related to suspension components.

Historical data

The C0606 code has been associated with vehicles that have air suspension systems, which are more complex and prone to sensor issues.

Urgency level

Moderate – It is advisable to address this issue promptly to avoid further suspension problems.

Legal and safety notice

Ignoring suspension issues can lead to unsafe driving conditions and potential legal liabilities.

Testing conditions

• Vehicle parked on a level surface

• Ignition in the 'on' position

Component location

The level control sensor is typically located near the vehicle's suspension components, often near the wheels or under the chassis.

FAQs

Q: Can I drive with a C0606 code?
A: While it may be possible to drive, it's not recommended as it can affect your vehicle's handling and safety.

Q: How do I reset the C0606 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.

Last updated: Feb 19, 2026 • Source: internal database
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