2008 Scion XB Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2008 Scion xB 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 2008 Scion xB 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 2008 Scion xB 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.

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.

What are the initial steps to diagnose the non-functioning cruise control in a 2008 Scion xB?

When diagnosing the non-functioning cruise control in a 2008 Scion xB, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the fuse related to the cruise control system, as a blown fuse is a common culprit that can easily be replaced. Next, assess the cruise control switch to ensure it is operational; a faulty switch can prevent the system from engaging properly. It's also important to check the brake pedal switch, which serves as a safety mechanism that disengages the cruise control when the brake is pressed. If these components are functioning correctly, utilize a diagnostic scanner to identify any error codes that may reveal deeper issues within the system. Lastly, confirm that the vehicle speed sensor is working, as it is essential for the cruise control to maintain the desired speed. By systematically addressing these areas, you can effectively troubleshoot and resolve the cruise control malfunction in your Scion xB.

What are the common problems that could cause the cruise control to stop working in a 2008 Scion xB?

When troubleshooting cruise control issues in a 2008 Scion xB, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is pressed; if this switch malfunctions, it can prevent the system from engaging. Another potential issue is a defective speed sensor, which is crucial for maintaining a constant speed; if this sensor fails, the cruise control may not function correctly. Additionally, a blown fuse in the cruise control system can lead to complete failure, so checking the fuse box for any blown fuses is a wise step. Vacuum leaks in the engine can also disrupt the cruise control's performance, as they affect the engine's ability to maintain steady speed. Lastly, a malfunctioning cruise control module can prevent the system from engaging or maintaining speed. By systematically addressing these common issues, DIY enthusiasts can effectively troubleshoot and resolve cruise control problems in their Scion xB.

How urgent is it to address the malfunctioning cruise control in a 2008 Scion xB?

When it comes to the malfunctioning cruise control in a 2008 Scion xB, understanding the urgency of the situation is crucial. While this feature may not pose an immediate safety risk, neglecting to address the problem can lead to more significant issues down the line. A malfunctioning cruise control system can stem from various causes, including electrical faults, sensor malfunctions, or mechanical failures. If left unchecked, these underlying problems could escalate, potentially affecting other vehicle systems and leading to costly repairs. Moreover, a properly functioning cruise control enhances driving comfort and convenience, making it essential to resolve any issues promptly. Therefore, even if the malfunction does not seem critical at first glance, it is advisable to have the system inspected by a qualified mechanic to ensure that your vehicle remains in optimal condition and to prevent any future complications.

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