Subaru Impreza Cruise Control Isn't Working

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

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 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.

Troubleshooting Cruise Control Issues in a Subaru Impreza

When troubleshooting cruise control issues in your Subaru Impreza, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown fuse can often be the simplest explanation for malfunctioning systems. Refer to your owner's manual to locate the specific fuse and replace it if necessary. If the problem persists, utilizing a scan tool can provide deeper insights into any error codes or underlying issues affecting the cruise control system. This step is crucial as it can help pinpoint specific malfunctions that may not be immediately visible. Should these initial steps not resolve the issue, consider consulting with a factory-trained technician who possesses the specialized knowledge and tools required for more complex diagnostics. Additionally, be mindful of any related problems in your vehicle, such as warning lights or other non-functioning components, as these can sometimes contribute to cruise control failures. Lastly, if your check engine light is illuminated, addressing the underlying cause is vital, as this can directly impact the functionality of your cruise control. By following this structured approach, you can effectively identify and resolve cruise control issues in your Subaru Impreza.

What Could Cause Cruise Control Issues in a Subaru Impreza?

When troubleshooting cruise control issues in a Subaru Impreza, it's essential to consider several common problems that could be affecting the system's performance. A malfunctioning control module, sensor, or switch is often at the heart of these issues, leading to erratic behavior or complete failure of the cruise control feature. Additionally, throttle actuation problems, particularly those stemming from a faulty throttle position sensor, can cause the engine's computer to overcompensate with fuel, which may result in noticeable black exhaust emissions. For models equipped with the Subaru EyeSight driver assist technology, dirty or obstructed cameras can hinder the system's ability to detect surrounding vehicles, further complicating cruise control functionality. Other components, such as the clutch and brake pedal switches, can also play a significant role; if these switches are malfunctioning, they may inadvertently disable the cruise control system. It's also important to note that if the check engine light activates, the cruise control will typically turn off as a safety precaution. A practical first step in diagnosing the issue is to check the cruise control fuse, which can be easily done by consulting the owner's manual for the fuse box diagram. By systematically addressing these potential problems, you can effectively identify and resolve the underlying cause of cruise control malfunctions in your Subaru Impreza.

Why is the Cruise Control Not Working in a Subaru Impreza?

When the cruise control in your Subaru Impreza malfunctions, it’s crucial to address the issue without delay. Ignoring symptoms such as a blinking cruise control light or erratic throttle response can lead to more significant problems, including compromised vehicle safety and increased repair costs. A faulty control module, sensor, or switch can disrupt the cruise control system, while issues with the throttle position sensor may cause the engine to run inefficiently, potentially leading to black exhaust emissions. Additionally, if the Neutral Safety Switch is not functioning correctly, it could disable the cruise control unexpectedly, posing a risk during highway driving. Therefore, it is advisable to have your vehicle inspected by a qualified technician as soon as you notice any irregularities. Prompt attention not only ensures your safety on the road but also helps maintain the overall health of your Subaru Impreza, preventing minor issues from escalating into major repairs.

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Subaru Impreza Cruise Control Issues: Causes & Repair Costs