2010 Acura TSX Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2010 Acura TSX: Common Causes and Solutions

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Reviewed by
Andrew Hajjar
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 2010 Acura TSX 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 2010 Acura TSX 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.

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

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 2010 Acura TSX?

When faced with a check engine light on your 2010 Acura TSX, it's essential to start with straightforward diagnostic steps that can help you identify the problem efficiently. Begin by checking the gas cap; a loose or damaged cap is a common culprit that can trigger the light. Next, take a moment to observe any other dashboard indicators, as they may provide additional context about the issue at hand. Utilizing an OBD-II scanner is a crucial step, as it allows you to retrieve specific error codes that can direct you to the source of the problem. Additionally, inspect the condition of your spark plugs, as worn or faulty plugs can lead to engine performance issues. It's also wise to check the levels of essential fluids like oil and coolant, ensuring they are within the recommended range. Finally, examine the wiring and connections around the engine for any signs of damage or corrosion, as these can lead to electrical problems that trigger the check engine light. By following these initial steps, you can gather valuable insights and potentially resolve the issue before seeking professional assistance.

What are the common problems that could cause the check engine light to illuminate in a 2010 Acura TSX?

When the check engine light comes on in a 2010 Acura TSX, it can be a source of concern for any DIY enthusiast. One of the first things to check is the gas cap; a loose or damaged cap is often the simplest fix and can easily be overlooked. If the gas cap is secure, the next step is to consider the oxygen sensor, which plays a crucial role in monitoring the vehicle's emissions and fuel efficiency. A malfunctioning sensor can lead to poor performance and increased emissions, making it essential to address. Additionally, issues with the catalytic converter can also trigger the check engine light, as it is vital for reducing harmful exhaust gases. Spark plugs and ignition coils are other common culprits; if they are worn or faulty, they can disrupt the engine's performance. Another component to inspect is the mass airflow sensor, which measures the amount of air entering the engine and can affect fuel mixture if it fails. Lastly, problems with the exhaust gas recirculation (EGR) system, such as a clogged valve, can also illuminate the check engine light. By systematically checking these components, DIYers can often identify and resolve the issue, ensuring their Acura TSX runs smoothly and efficiently.

How urgent is it to address the check engine light in a 2010 Acura TSX?

Addressing the check engine light in a 2010 Acura TSX is not just a matter of convenience; it is a critical step in ensuring the safety and longevity of your vehicle. When this warning light illuminates, it signals that there is an issue with the engine or emissions system that requires immediate attention. Ignoring this alert can lead to decreased engine performance and fuel efficiency, which not only affects your driving experience but can also result in more severe mechanical failures. Over time, what may start as a minor issue can escalate into significant damage, leading to costly repairs that could have been avoided with prompt action. Furthermore, modern vehicles are equipped with intricate systems that work in harmony, and neglecting the check engine light can disrupt this balance, potentially causing complications in other components. Therefore, it is essential to prioritize addressing the check engine light to maintain your Acura TSX's performance, prevent safety risks, and avoid unnecessary expenses in the future.

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