BMW M6 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your BMW M6 and How to Fix Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a BMW M6 cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a BMW M6 cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When the throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

Troubleshooting Cruise Control Issues in a BMW M6

When troubleshooting cruise control issues in your BMW M6, it's essential to adopt a systematic diagnostic approach. Begin by checking the simplest potential causes, such as inspecting the cruise control fuse in the fuse box for any signs of a blown fuse, as this is a common and easily fixable issue. If the fuse is intact, consider the functionality of the clutch and gear identification switches, as faults in these components can disrupt cruise control operation. Additionally, pay attention to any intermittent issues that may arise, which could indicate a faulty cruise control actuator or wiring problems. It's also crucial to assess the brake system, as any malfunctions here can directly impact cruise control functionality. By methodically addressing these areas, you can effectively narrow down the source of the problem and potentially resolve it without needing professional assistance. However, if the issue persists after these checks, consulting a professional at your local BMW dealership may be necessary for more complex diagnostics.

What Could Cause Cruise Control Malfunctions in a BMW M6?

When troubleshooting cruise control malfunctions in a BMW M6, it's important to consider several common problems that could be affecting the system. One of the primary culprits is failed or dirty sensors, particularly speed sensors, which play a vital role in the cruise control's operation. If these sensors are not functioning correctly, they can disrupt the system's ability to maintain speed. Additionally, a blown fuse can lead to a complete failure of the cruise control system, making it essential to check the vehicle's fuse box. Battery issues can also impact the cruise control's performance, as a weak or failing battery may not provide the necessary power for the system to operate effectively. Furthermore, a dirty speed sensor can hinder communication with the vehicle's computer, resulting in erratic cruise control behavior. Wiring issues, such as frayed or damaged wires, can create interruptions in the system's functionality, while a dirty or damaged throttle control can prevent the cruise control from engaging properly. By systematically diagnosing these potential issues, DIY enthusiasts can effectively identify and resolve cruise control malfunctions in their BMW M6.

Why is the Cruise Control Not Working in a BMW M6?

When the cruise control in your BMW M6 is not functioning, it’s crucial to address the issue without delay. Ignoring the malfunction can lead to unsafe driving conditions, particularly on long trips where maintaining speed is essential for safety and comfort. A malfunctioning cruise control system may indicate underlying problems such as failed sensors or a blown fuse, which could escalate into more significant mechanical failures if left unchecked. Additionally, discrepancies in wheel rotation or issues with the clutch and gear identification switches can compromise the vehicle's performance, potentially leading to costly repairs. By promptly diagnosing and resolving these issues, you not only ensure your safety on the road but also maintain the integrity and performance of your BMW M6, preventing further complications down the line.

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