2008 Acura TSX Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2008 Acura TSX: Common Causes and Solutions

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Reviewed by
Bo Fader
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 2008 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 2008 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 2008 Acura TSX?

When faced with a check engine light on your 2008 Acura TSX, the first step is to perform a diagnostic test, which can be done using an OBD-II scanner. This tool will read the trouble codes stored in your vehicle's computer, giving you a clearer idea of what might be wrong. Once you have the codes, it's essential to check for common issues associated with the Acura TSX, such as faulty spark plugs, a malfunctioning catalytic converter, or bad ignition coils. These components are often the culprits behind the check engine light. Start by inspecting the ignition coils, as they are relatively easy to access and replace if necessary. If the coils appear to be in good condition, you can then move on to examining the spark plugs and other potential issues. By following this structured approach, you can effectively narrow down the cause of the check engine light and take the necessary steps to resolve the problem, potentially saving on costly repairs.

What are the common problems that could cause the check engine light to illuminate in a 2008 Acura TSX?

When the check engine light comes on in a 2008 Acura TSX, it can be a source of concern for any car owner. One of the most frequent culprits is a loose gas cap, which can easily be checked and tightened to resolve the issue. Another common problem is a faulty oxygen sensor, which affects the air-fuel mixture and can lead to decreased fuel efficiency. Additionally, issues with the catalytic converter, such as blockages or failures, can trigger the light, indicating a need for further inspection. A defective mass airflow sensor may also be at fault, as it plays a crucial role in regulating engine performance. Furthermore, problems with spark plugs or ignition coils can cause engine misfires, leading to the illumination of the check engine light. Lastly, a malfunctioning EGR valve can create emission control issues, contributing to the warning light's activation. Addressing these issues promptly is vital to maintaining the vehicle's performance and preventing further damage, making it essential for DIY enthusiasts to be aware of these common problems.

How urgent is it to address the check engine light in a 2008 Acura TSX?

When the check engine light illuminates in your 2008 Acura TSX, it serves as a critical warning that should not be ignored. This light often signifies underlying issues with the engine or emissions system, which, if left unaddressed, can escalate into more severe problems, potentially leading to costly repairs. For DIY enthusiasts, understanding the urgency of this warning is essential; neglecting it can result in decreased fuel efficiency and compromised vehicle performance, making your driving experience less enjoyable and more expensive. Moreover, modern vehicles are equipped with sophisticated onboard diagnostics that can help identify specific issues, allowing you to take informed action. Therefore, it is advisable to conduct a thorough inspection or consult a professional as soon as the check engine light appears, ensuring your Acura TSX remains in optimal condition and preventing further damage down the line.

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