Check Engine Light And Cruise Flashing Subaru: Troubleshooting Guide

The check engine light and cruise control flashing in a Subaru indicates that the cruise control has been disabled due to a problem detected by the vehicle’s engine management system. This can be caused by a variety of issues such as a faulty sensor, wiring problem, or engine malfunction.

It is important to have the vehicle diagnosed and repaired to prevent any further damage or issues with the engine or transmission.

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Common Causes

If you own a Subaru vehicle and notice the check engine light and cruise control light flashing, it’s important to address the issue promptly. While there can be various reasons behind this, there are some common causes that you should be aware of. Understanding these common causes will help you diagnose the problem accurately and take the necessary steps to resolve it. Let’s take a closer look at three common causes that can trigger the check engine light and cruise control light to flash in your Subaru.

Faulty Oxygen Sensor

One of the potential culprits behind the flashing check engine and cruise control lights in your Subaru is a faulty oxygen sensor. The oxygen sensor plays a crucial role in monitoring the level of oxygen in the exhaust gases and providing the engine control module (ECM) with vital information to adjust the air-fuel mixture. A malfunctioning oxygen sensor can lead to inaccurate fuel-air mixture, affecting the engine’s performance and triggering the warning lights.

Loose Fuel Cap

Believe it or not, something as simple as a loose fuel cap can cause the check engine light and cruise control light to flash in your Subaru. The fuel cap seals the fuel tank, preventing evaporative emissions. If it’s not tightened properly or is damaged, it can create a leak and trigger the warning lights. So, before jumping to more serious conclusions, make sure to check the fuel cap and ensure it’s securely tightened.

Catalytic Converter Issues

The catalytic converter is a vital component of your Subaru’s exhaust system that helps reduce harmful emissions. If it becomes clogged or damaged, it can restrict the flow of exhaust gases, affecting the engine’s performance and triggering the check engine light and cruise control light to flash. Issues with the catalytic converter should not be ignored, as they can result in costly repairs and further damage to your vehicle.

It’s important to note that while these are common causes, there can be other reasons behind the flashing check engine and cruise control lights in your Subaru. It’s recommended to consult with a professional mechanic or bring your vehicle to a Subaru dealership to diagnose the issue accurately. Ignoring the warning lights can potentially lead to further damage and costly repairs.

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Impact On Vehicle

When the check engine light and cruise control light start flashing on your Subaru, it’s important to understand the potential impact it can have on your vehicle. Ignoring these warning lights and continuing to drive can result in performance impairment, fuel efficiency reduction, and potential engine damage. Let’s take a closer look at each of these consequences:

Performance Impairment

When the check engine light and cruise control light are flashing, it indicates that there is a problem with the engine or related systems. This can lead to performance issues such as reduced power, hesitation, and rough idling. The vehicle may also experience difficulty in accelerating and maintaining speed. It’s crucial to address these issues promptly to ensure the smooth operation of your vehicle.

Fuel Efficiency Reduction

A flashing check engine light and cruise control light can also lead to decreased fuel efficiency. An engine problem can cause improper combustion, resulting in wasted fuel and reduced mileage. Inefficient fuel consumption not only puts a dent in your wallet but also harms the environment. Resolving the underlying issue can help restore optimal fuel efficiency and save you money at the pump.

Potential Engine Damage

Perhaps the most concerning consequence of ignoring the flashing lights is the potential for engine damage. When the engine misfires, it can send unburned fuel into the exhaust system, increasing the temperature of the catalytic converter. Continued driving in this condition can cause severe damage to the converter, leading to costly repairs or even the need for a complete replacement. It’s essential to address the underlying issue promptly to prevent any further damage to the engine.

In conclusion, when the check engine light and cruise control light start flashing on your Subaru, it’s crucial to take immediate action. Ignoring these warning lights can result in performance impairment, fuel efficiency reduction, and potential engine damage. To protect your vehicle and ensure its longevity, consult a professional mechanic for diagnosis and necessary repairs.

Troubleshooting Steps

If your Subaru’s check engine light is on and the cruise control light is flashing, it’s essential to address the issue promptly to prevent potential damage to the vehicle. Below are the troubleshooting steps to help you identify and resolve the problem.

Check The Gas Cap

Start by checking the gas cap to ensure it is properly tightened. A loose or faulty gas cap can trigger the check engine light and cause the cruise control light to flash. Tighten or replace the gas cap as needed to see if the issue resolves.

Inspect Oxygen Sensors

Next, inspect the oxygen sensors for any signs of damage or malfunction. Faulty oxygen sensors can lead to an imbalance in the air-fuel mixture, triggering the check engine light and impacting the cruise control system. Replace any faulty sensors to restore proper functionality.

Diagnostic Trouble Code Scan

Perform a diagnostic trouble code (DTC) scan using a compatible scan tool to identify specific error codes associated with the check engine light and cruise control issue. The DTC scan will provide valuable insights into the root cause of the problem, allowing for targeted repairs or component replacements.

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Professional Consultation

When faced with a blinking check engine light and flashing cruise control in your Subaru, consulting a professional mechanic is vital. A skilled mechanic has the expertise to diagnose the issue accurately.

Opting for Subaru dealership services ensures specialized attention to your vehicle’s specific needs. Dealership technicians possess in-depth knowledge about Subaru models, enhancing the diagnostic precision.

Preventive Measures

Regular Maintenance

Ensure scheduled maintenance checks to avoid dashboard light issues.

Proper Fueling Habits

Use high-quality fuel to prevent engine issues that trigger warning lights.

Using Quality Engine Oil

Opt for reputable engine oil brands to maintain engine health.

Frequently Asked Questions Of Check Engine Light And Cruise Flashing Subaru

Why Is My Cruise Control Blinking And Check Engine Light Subaru?

When the check engine light comes on in a Subaru, the cruise control light may blink, indicating that the cruise control has been disabled. This happens when there is a problem affecting the engine’s performance. It is best to have the vehicle diagnosed by a professional.

Why Did My Traction Control And Check Engine Light Come On Subaru?

The traction control and check engine light on your Subaru may come on due to various reasons. It could be a faulty sensor, wiring issue, module fault, or engine malfunction. When the check engine light is on, the cruise control light will blink, indicating that the cruise control and vehicle’s dynamic stability control are disabled.

Can Cruise Control Make Your Check Engine Light Come On?

Yes, cruise control can make your check engine light come on. It could be related to transmission or vehicle speed issues that the cruise control relies on. Use a scan tool or code reader to determine the cause of the check engine light.

Why Is My Subaru Check Engine Light Flashing?

The Subaru check engine light flashes to indicate a severe engine misfire, which can damage the catalytic converter. This disables the cruise control and stability control. It requires immediate attention to prevent expensive repairs.

Conclusion

If you’re experiencing the check engine light and flashing cruise control in your Subaru, it’s crucial to address the underlying issue promptly. Ignoring these warnings can lead to costly repairs and compromised vehicle performance. Consult with a qualified technician to diagnose and resolve the problem, ensuring the safety and reliability of your Subaru.