If your cruise control is not working, it means the system cannot maintain your set speed. This can be caused by electrical faults, sensor issues, or problems with the throttle or brake system. While not critical to vehicle safety in the same way as brakes or steering, a non-working cruise control can reduce convenience and may indicate underlying issues that need attention.

What does it mean if the cruise control isn’t working?

When cruise control fails, the system cannot engage or maintain the speed you select. Depending on the cause, the cruise control light may not come on, or the system may disengage unexpectedly.

Common causes of cruise control not working

• Blown fuse or faulty relay in the cruise control circuit
• Faulty brake light switch (common cause)
• Clutch switch fault (in manual cars)
• Malfunctioning throttle actuator or throttle cable
• Faulty cruise control module or wiring issue
• Speed sensor failure
• Problem detected by ECU (engine control unit)

Why do you need to fix this problem?

While cruise control is not essential for vehicle operation, its failure may signal deeper issues in the braking, throttle, or electrical system. Repairing it restores convenience and ensures no hidden faults are left unresolved.

How do you know when to get it checked?

You should book an inspection if:

• The cruise control system does not activate at all
• The cruise control light does not appear on the dashboard
• The system disengages randomly while driving
• Your brake or clutch pedal feels unusual
• Other warning lights (such as ABS or Check Engine) are on

What happens during an assessment?

A mechanic will:

1. Check fuses, relays, and wiring for faults
2. Test the brake and clutch pedal switches
3. Inspect the throttle actuator or cable
4. Check speed sensors and ECU error codes
5. Test the cruise control module and steering wheel controls
6. Confirm proper operation after repairs

How much does it cost to fix?

Minor repairs such as replacing a brake light or clutch switch may cost $120–$250. Speed sensor replacement typically costs $200–$400. More complex issues involving the ECU or cruise control module can cost $500–$1,200+.

Is it unsafe to drive with broken cruise control?

No, it’s generally safe to drive without cruise control, but it may make long journeys less comfortable. However, since the fault may involve brake or throttle sensors, it’s wise to have it checked to rule out safety-critical issues.