2013 Subaru Impreza Has A Check Engine Light

Resolve Check Engine Light Issues in Your 2013 Subaru Impreza

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Emissions System
0%
60% chance it's
Something else
The most common reasons a 2013 Subaru Impreza has a check engine light are an emissions system component, a sensor, or a catalytic converter.
  • Emissions System: A faulty emissions system component, such as an oxygen sensor or EGR valve, can lead to increased emissions and trigger the check engine light.
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 2013 Subaru Impreza has a check engine light?

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.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a check engine light on a 2013 Subaru Impreza?

When the check engine light illuminates on your 2013 Subaru Impreza, the first step is to check the gas cap, as a loose or damaged cap is a common culprit. Ensure it is securely fastened, and if the light turns off afterward, you’ve likely resolved the issue. Next, observe the behavior of the light; a steady light suggests a need for professional attention, while an intermittent light may indicate specific driving conditions that trigger the warning. A flashing light, however, signals a serious problem, such as an engine misfire, necessitating immediate action to prevent further damage. If the light persists, using an OBD-II scanner can provide valuable insights by reading trouble codes from the vehicle’s onboard computer. These codes can point to various issues, from sensor failures to more significant engine problems. If you’re uncertain about interpreting these codes or the next steps, consulting a professional mechanic is advisable, as they possess the expertise and tools necessary for accurate diagnosis and repair. By following this diagnostic approach, you can effectively address the check engine light concern and ensure your Subaru Impreza remains in optimal condition.

What are the common problems that could cause the check engine light to illuminate in a 2013 Subaru Impreza?

When the check engine light illuminates in a 2013 Subaru Impreza, it can be attributed to several common problems that DIYers can investigate. One frequent culprit is a loose or faulty gas cap, which can lead to fuel vapor leaks and reduced fuel efficiency. Another common issue is a malfunctioning oxygen sensor, which plays a critical role in regulating the air-fuel mixture; if it fails, it can disrupt engine performance. Additionally, worn or dirty spark plugs and spark plug wires can cause engine misfires, resulting in a flashing check engine light that signals a more urgent problem. Problems with the catalytic converter, such as clogs or failures, can also trigger the light, as this component is essential for emissions control. Other potential issues include malfunctions in the fuel and air metering systems, which are vital for maintaining the correct engine mixture, as well as computer output circuit problems that affect the vehicle's onboard diagnostics. Exhaust system leaks and faulty coolant temperature sensors can further contribute to the check engine light's activation. Lastly, issues within the EVAP system, responsible for managing fuel vapors, can also be a factor. By understanding these common problems, DIY enthusiasts can take the first steps toward diagnosing and addressing the check engine light in their Subaru Impreza.

How urgent is it to address the check engine light in a 2013 Subaru Impreza?

When it comes to the check engine light in your 2013 Subaru Impreza, understanding the urgency of the situation is crucial for both safety and vehicle longevity. A steady check engine light may not require immediate action, as it often points to minor issues like a loose gas cap or a faulty sensor. However, it is still wise to have these problems checked out soon to avoid escalating repairs. On the other hand, a flashing check engine light is a serious warning that indicates potential engine misfires or other critical issues that could lead to severe damage if ignored. In such cases, it is imperative to stop driving immediately and seek professional assistance. Additionally, if you experience any performance issues, such as reduced power or unusual noises, it is a clear sign that your vehicle needs prompt attention. Ignoring these symptoms can result in costly repairs down the line, making it essential to diagnose and address any issues as soon as possible. By staying vigilant and proactive, you can ensure the safety and reliability of your Subaru Impreza while potentially saving yourself from significant repair costs.

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