2022 Subaru WRX STI Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2022 Subaru WRX STI: Common Causes and Solutions

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Reviewed by
Devin Cabugcal
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 2022 Subaru WRX STI 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 2022 Subaru WRX STI 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.

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 2022 Subaru WRX STI?

When faced with a check engine light on your 2022 Subaru WRX STI, it's essential to approach the diagnosis methodically. Start by checking the gas cap; a loose or damaged cap is a common culprit that can easily trigger the light. Next, take a moment to inspect your dashboard gauges for any additional warning lights or unusual readings, as these can provide further clues about the underlying issue. A visual inspection under the hood is also beneficial; look for any signs of wear or damage to wires and hoses that could indicate a problem. If these initial checks do not resolve the issue, using an OBD-II scanner is a crucial next step. This tool will help you retrieve specific error codes that can pinpoint the problem more accurately. Be sure to consult your owner's manual for detailed explanations of these codes and recommended actions. If, after these steps, the cause remains unclear or the issue appears complex, seeking professional assistance from a qualified mechanic or dealership is advisable to ensure proper diagnosis and repair. By following this structured approach, you can effectively troubleshoot the check engine light and take informed steps toward resolving the issue.

What are the common problems that could cause the check engine light to illuminate in a 2022 Subaru WRX STI?

When the check engine light comes on in a 2022 Subaru WRX STI, it can be a source of concern for any driver. One of the most straightforward issues to check is the gas cap; a loose or damaged cap can easily trigger the light. If that’s not the culprit, consider the oxygen sensor, which plays a crucial role in maintaining the correct air-fuel mixture; a faulty sensor can lead to performance issues. Additionally, problems with the catalytic converter, such as inefficiency or failure, can also illuminate the light, indicating a need for further inspection. Spark plugs are another common issue; worn or faulty plugs can cause misfires and affect engine performance. The mass airflow sensor is vital for regulating the air-fuel ratio, and if it malfunctions, it can lead to the check engine light turning on. Ignition coil problems can also result in misfires, while an overall engine misfire can stem from various sources, including fuel delivery issues. Addressing these problems promptly is essential to prevent further damage and maintain optimal vehicle performance. For those who prefer a DIY approach, starting with these common issues can help diagnose the problem effectively.

How urgent is it to address the check engine light in a 2022 Subaru WRX STI?

Addressing the check engine light in your 2022 Subaru WRX STI is not just a matter of convenience; it is a critical step in ensuring the longevity and safety of your vehicle. Ignoring this warning can lead to escalating problems, including severe engine damage and costly repairs. The check engine light is your car's way of communicating that something is amiss, often related to the engine or emissions system. By promptly diagnosing the issue, you can leverage the advanced onboard diagnostics systems in modern vehicles to identify the root cause, which can often be a straightforward fix for a DIY enthusiast. Moreover, neglecting the light can result in diminished fuel efficiency and compromised vehicle performance, which not only affects your wallet but could also pose safety risks on the road. Therefore, if you see that light illuminate, it is imperative to take action quickly—whether that means using an OBD-II scanner to read the codes yourself or consulting a professional mechanic to prevent further complications.

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