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Code C0085

Symptoms

• Traction disable indicator light not working

• Traction control system not functioning properly

• Warning light on the dashboard

Common Causes

• Faulty traction disable indicator bulb

• Damaged wiring or connectors

• Malfunctioning traction control module

Glossary

Traction Control: A system that helps prevent wheel slip during acceleration.

Indicator Light: A light on the dashboard that signals a specific status or issue.

Related Codes

• C0080

• C0081

Laymans terms

This code means that the car's computer has detected a problem with the light that shows if the traction control is turned off. It's like a warning light on a toy that tells you something isn't working right.

Explanation

The C0085 code is triggered when the vehicle's traction control system detects an issue with the traction disable indicator circuit.

Technical description

The traction disable indicator is part of the vehicle's traction control system. This code indicates a malfunction in the circuit responsible for illuminating the indicator light that shows when traction control is disabled. This could be due to wiring issues, a faulty bulb, or a problem with the control module.

Diagnosis steps

• Inspect the traction disable indicator bulb for damage.

• Check wiring and connectors for continuity and damage.

• Test the traction control module for faults.

Repair procedures

• Replace the faulty indicator bulb.

• Repair or replace damaged wiring or connectors.

• Replace the traction control module if necessary.

Tools required

• Multimeter

• OBD-II scanner

• Screwdriver set

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regularly check dashboard lights for functionality.

• Inspect wiring and connectors during routine maintenance.

• Ensure the traction control system is serviced as per the vehicle's maintenance schedule.

Error code type

Sensor Issue

User experience recommendations

• If the traction control system is not needed, you can drive the vehicle, but be cautious in slippery conditions.

• Schedule a service appointment to diagnose and fix the issue.

Warranty information

Check your vehicle's warranty for coverage on electrical components related to the traction control system.

Historical data

This code has been commonly associated with vehicles that have a history of electrical issues, particularly in the traction control system.

Urgency level

Moderate – While the vehicle can still be driven, it is important to address this issue to ensure the traction control system functions properly.

Legal and safety notice

Driving without a functioning traction control system can increase the risk of losing control of the vehicle in adverse conditions.

Testing conditions

• Vehicle ignition in the ON position.

• Traction control system activated.

Component location

The traction disable indicator is typically located on the vehicle's dashboard.

FAQs

Q: Can I drive with the C0085 code?
A: Yes, but be cautious as the traction control system may not be functioning properly.

Q: How do I know if the traction disable indicator is faulty?
A: If the indicator light does not illuminate when the traction control is disabled, it may be faulty.

Last updated: Jun 8, 2026 • Source: internal database
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