2000 Volvo S70 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2000 Volvo S70 and How to Fix Them

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Reviewed by
Bo Fader
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 2000 Volvo S70 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 2000 Volvo S70 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2000 Volvo S70?

When troubleshooting the non-functioning cruise control in a 2000 Volvo S70, it's essential to adopt a systematic diagnostic approach. Start by examining the brake pedal switch, as this component is often the source of the problem. Ensure that the switch is properly engaged when the brake pedal is released, as a dislodged or worn switch can prevent the cruise control from activating. Next, inspect the vacuum hoses and lines for any signs of damage, such as cracks or blockages, since the cruise control system relies on vacuum pressure to operate effectively. If the hoses appear intact, proceed to check the vacuum pump itself to confirm it is generating the necessary vacuum pressure; a malfunctioning pump may require repair or replacement. Additionally, verify the functionality of the brake light switch, as it can also impact cruise control operation. Don't forget to check the relevant fuse in the fuse box, as a blown fuse can disrupt the entire system. Finally, if all else fails, inspect the cruise control module or relay, which may need to be replaced if found faulty. By following this structured approach, you can efficiently diagnose and potentially resolve issues with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2000 Volvo S70?

When troubleshooting the cruise control system in a 2000 Volvo S70, it's essential to understand the common problems that may arise. One frequent issue is the brake pedal switch, which can become dislodged or wear out, preventing the cruise control from engaging. This switch is typically located above the gas pedal, and a simple check can be performed by lifting the brake pedal with your toes while attempting to activate the cruise control. Another critical component is the vacuum system; any cracks or pinholes in the vacuum lines, along with loose or disconnected hoses, can disrupt the system's functionality. The vacuum pump, often found under the battery tray, should also be inspected for any signs of damage. Additionally, the cruise control module or relay, located under the fuse panel cover, can malfunction, leading to a failure in the cruise control operation. The speed sensor, which relays the vehicle's speed to the cruise control module, is another potential culprit; if it is not functioning correctly, the cruise control may not engage. Lastly, a blown fuse, particularly fuse number 29, can also cause issues, as it is responsible for various electrical functions in the vehicle. By systematically checking these components, you can effectively diagnose and potentially resolve the cruise control issues in your Volvo S70.

How urgent is it to repair the non-functioning cruise control in a 2000 Volvo S70?

When considering the urgency of repairing a non-functioning cruise control in a 2000 Volvo S70, it's essential to assess the broader context of vehicle safety and maintenance. While a malfunctioning cruise control may not pose an immediate threat compared to critical systems like the anti-lock braking system, it can still indicate underlying issues that warrant attention. If your vehicle is experiencing intermittent cruise control functionality, it may not seem pressing, but this could be a symptom of more significant problems that could affect your driving experience and safety. Additionally, if your vehicle is part of a recall related to throttle positioning sensor irregularities, addressing this issue promptly is crucial to prevent further complications. Regular maintenance is also a key factor; if your vehicle is overdue for essential services, such as timing belt replacement, it’s wise to tackle multiple repairs at once to ensure long-term reliability. Ultimately, while the urgency may vary, it is advisable to investigate and repair the cruise control system, especially if it is linked to other safety concerns or recalls, to maintain the overall health of your vehicle.

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2000 Volvo S70 Cruise Control Issues & Repair Guide