Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that helps make steering easier at low speeds and firmer at high speeds.
The variable effort steering system adjusts the steering feel based on vehicle speed, providing lighter steering at low speeds and firmer steering at high speeds.
The C0079 code indicates an issue with the variable effort steering system, which may involve components such as the steering control module, variable assist power steering solenoid, or related wiring. This system uses electronic controls to adjust the steering effort required by the driver.
• Steering feels too stiff or too loose
• Variable steering effort not functioning
• Warning light on the dashboard
• Faulty steering control module
• Malfunctioning variable assist power steering solenoid
• Damaged or corroded wiring or connectors
Variable Effort Steering: A system that adjusts steering effort based on vehicle speed.
Solenoid: An electromechanical device used to control the flow of power or fluid.
• Check for any other related codes and clear them.
• Inspect the wiring and connectors for damage or corrosion.
• Test the steering control module and solenoid for proper operation.
• Replace the faulty steering control module.
• Repair or replace damaged wiring or connectors.
• Replace the variable assist power steering solenoid if faulty.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Chevrolet Impala
• Buick LaCrosse
• Cadillac CTS
• Regularly inspect steering system components.
• Ensure connectors are clean and secure.
• Follow the vehicle's maintenance schedule.
Sensor Issue
• If steering feels unusual, have it checked by a professional.
• Avoid driving at high speeds if steering is not responding correctly.
Check with the vehicle manufacturer for warranty coverage on steering components.
This code has been associated with vehicles equipped with electronic variable effort steering systems, particularly in models from the early 2000s onward.
Moderate – Steering issues can affect vehicle handling and safety.
Driving with compromised steering can be dangerous. Address this issue promptly to ensure safe vehicle operation.
• Vehicle at various speeds
• Steering system under load
The variable effort steering components are typically located near the steering column or integrated within the steering rack.
Q: Can I drive with a C0079 code?
A: It's not recommended to drive with this code active, as it can affect steering performance and safety.
Q: How do I reset the C0079 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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