2018 Subaru Impreza Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Subaru Impreza and How to Fix Them

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Reviewed by

Andrew Hajjar

Written by RepairPal Car Genius

Updated January 14, 2025

30% chance it's the

Sensor

25% chance it's the

Control Module

25% chance it's the

Throttle

20% chance it's

Something else

The most common reasons a 2018 Subaru Impreza 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.

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RepairPal Certified shops can diagnose and repair your 2018 Subaru Impreza electronics and electrical issues. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2018 Subaru Impreza?

When troubleshooting the non-functioning cruise control in a 2018 Subaru Impreza, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, ensure that the cruise control settings are correctly configured according to the manufacturer's guidelines, as incorrect settings can prevent activation. If these initial checks do not resolve the issue, use a diagnostic scanner to look for any error codes that may indicate specific problems within the cruise control system. Additionally, inspect the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these controls are crucial for operation. Finally, examine the brake pedal switch, since a faulty switch can inhibit the cruise control from engaging. By following this structured approach, you can effectively identify and address the underlying issues with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2018 Subaru Impreza?

When your cruise control stops working in a 2018 Subaru Impreza, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the first things to check is the brake light switch, as a faulty switch can prevent the cruise control from engaging, since it is designed to deactivate when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to cruise control failure. It's also wise to inspect the fuses related to the cruise control system, as a blown fuse can completely disable its functionality. If these components are functioning correctly, consider examining the cruise control module itself, as a defect here can hinder communication with other vehicle systems. Lastly, throttle-related issues, such as a stuck throttle or problems with the throttle position sensor, can also impact cruise control performance. By systematically checking these areas, you can identify and potentially resolve the cruise control issues in your Subaru Impreza.

How urgent is it to address the malfunctioning cruise control in my 2018 Subaru Impreza?

When it comes to your 2018 Subaru Impreza, addressing a malfunctioning cruise control system is not just a matter of convenience; it is a critical safety concern that should be prioritized. A malfunction can lead to unexpected acceleration or deceleration, which significantly increases the risk of accidents on the road. Moreover, ignoring these symptoms can compromise your control over the vehicle's speed, making it particularly dangerous in varying driving conditions such as heavy traffic or inclement weather. By taking prompt action to diagnose and repair the issue, you not only enhance your safety but also prevent the likelihood of more extensive and costly repairs down the line. Therefore, if you notice any irregularities with your cruise control, it is essential to address them immediately to ensure both your safety and the reliable performance of your vehicle.

Related 2018 Subaru Impreza Problems

Read about related problems experienced by other Subaru Impreza drivers like you.

Subaru Impreza check engine, skid, and cruise lights issue with potential catalytic converter failure

Some Subaru Impreza owners report experiencing warning lights, such as the check engine, skid, and cruise control lights, which may indicate various issues, including potential catalytic converter failure. These lights can illuminate when the on-board diagnostic system detects problems with the engine or emissions system, and a blinking check engine light often signifies a major issue like engine misfiring that requires immediate attention. Additionally, the cruise control and traction control lights may activate as a response to the check engine light being on. While some owners attempt to reset these warning lights by disconnecting the battery and discharging the system, it is crucial to address the underlying issues causing them. Furthermore, it is common for the cruise control to deactivate when the check engine light is illuminated as a safety precaution. Problems with sensors, such as the rear O2 sensor, can also affect the data sent to the Engine Control Module (ECM), potentially triggering these warning lights. Therefore, it is advisable for owners experiencing these symptoms to have their Subaru Impreza inspected by a mechanic to diagnose the specific issue and prevent further damage or costly repairs.

2 model years affected

Avg Mileage: 1179,016

3 others reported problem

2 comments

Subaru Impreza engine light, road skid light, and cruise light illuminated with stalling issue when not using both feet

Some Subaru Impreza owners report experiencing issues when the engine light, road skid light, and cruise light illuminate simultaneously, often accompanied by stalling when not using both feet. These warning lights may indicate that a check engine code has been stored, which disables the cruise control until the underlying problem is resolved. Additionally, some owners find that bad ignition coils can lead to engine performance issues, triggering the check engine light. Ignoring a consistently illuminated check engine light can result in significant problems and increased repair costs, making it crucial to address these issues promptly. Furthermore, some owners note that higher RPMs can lead to increased fuel consumption, which may not be ideal for long-distance travel. It is advisable for owners experiencing these symptoms to have their vehicle inspected by a qualified mechanic to diagnose and resolve the specific issues to avoid more severe problems in the future.

1 model year affected

See More 2018 Subaru Impreza Problems

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