2023 Lexus IS350 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2023 Lexus IS350

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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 2023 Lexus IS350 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 2023 Lexus IS350 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 vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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 steps should I take to diagnose the non-functioning cruise control in my 2023 Lexus IS350?

To effectively diagnose the non-functioning cruise control in your 2023 Lexus IS350, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can prevent the system from engaging. Following this, verify the functionality of the speed sensor, which is essential for cruise control operation; a malfunctioning sensor can lead to significant issues. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying problems. Additionally, ensure that the brake and clutch switches are functioning correctly, as these components are designed to disengage the cruise control when activated. Finally, inspect the wiring and connections associated with the cruise control system for any damage or loose connections that could disrupt its operation. By following this structured diagnostic approach, you can efficiently identify and address the root cause of your cruise control issues.

What are the common problems that could cause the cruise control to stop working in a 2023 Lexus IS350?

When the cruise control in your 2023 Lexus IS350 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty cruise control switch, which may fail to engage or disengage the system properly. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a consistent speed, leading to erratic performance. Another potential problem is a malfunctioning brake light switch; if this switch is faulty, it may prevent the cruise control from activating as a safety precaution. Furthermore, the throttle actuator plays a crucial role in adjusting the vehicle's speed, and any malfunction here can hinder cruise control functionality. Lastly, electrical problems such as wiring issues or blown fuses can also disrupt the system. By being aware of these common issues, you can take the first steps toward troubleshooting and potentially resolving the cruise control problems in your Lexus IS350.

How urgent is it to address the malfunctioning cruise control in a 2023 Lexus IS350?

When it comes to a malfunctioning cruise control in a 2023 Lexus IS350, the urgency of addressing the issue cannot be overstated. A malfunctioning system can lead to unexpected acceleration or deceleration, creating a significant safety hazard not only for the driver but also for other road users. Additionally, such issues can detract from the overall driving experience, affecting both comfort and vehicle performance. Ignoring these symptoms may result in increased fuel consumption and could potentially cause damage to critical components like the engine or transmission. By addressing the malfunction promptly, you not only enhance your safety but also prevent further damage to the cruise control system and related parts, which can save you from costly repairs down the line. Therefore, it is crucial to have the issue diagnosed and repaired by a qualified technician as soon as possible to ensure a safe and smooth driving experience.

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