Acura TLX Has A Check Engine Light

Troubleshooting Common Causes for the Check Engine Light in Your Acura TLX and How to Resolve Them

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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 Acura TLX 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 Acura TLX 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.

Troubleshooting Check Engine Light in an Acura TLX

When faced with a Check Engine Light in your Acura TLX, it's essential to adopt a systematic diagnostic approach. Begin by checking for the simplest issues, such as ensuring that the gas cap is securely tightened, as a loose cap can often trigger the light. If the light remains illuminated, utilize an OBD scanner to read the trouble codes, which will provide insight into the specific problem affecting your vehicle. Common culprits include faulty spark plugs, ignition coils, or issues with the exhaust gas oxygen sensor. Once you have identified the trouble code, address the underlying issue, whether it involves replacing a part or cleaning a component. After making repairs, take your car for a short drive to allow the onboard diagnostics to reset and confirm that the issue has been resolved. If the light persists, consider disconnecting the battery for a brief period to reset the system. By following this methodical approach, you can effectively troubleshoot and resolve Check Engine Light issues in your Acura TLX, saving time and potentially costly repairs.

What Common Problems Cause the Check Engine Light to Illuminate in an Acura TLX?

When the check engine light comes on in your Acura TLX, it can be a source of frustration, but understanding the common problems can empower you to take action. One of the simplest issues to check is the gas cap; a loose or damaged cap can easily trigger the light, so ensure it is securely fastened and free of cracks. If the gas cap is not the culprit, consider the oxygen sensor, which can fail and cause poor engine performance, particularly during acceleration. Another potential issue is the catalytic converter, which can malfunction and lead to increased emissions and engine strain. Additionally, inspect the spark plugs and ignition coils, as worn or faulty components can disrupt the ignition process, resulting in the check engine light illuminating. Lastly, a dirty engine air filter can restrict airflow, affecting engine efficiency and triggering the warning light. By diagnosing these common issues, you can take the first steps toward resolving the check engine light and maintaining your Acura TLX's performance.

Why is the Check Engine Light Important in an Acura TLX?

The Check Engine Light in your Acura TLX is not just a simple warning; it serves as a critical alert that should never be ignored. When this light illuminates, it signifies that your vehicle's onboard diagnostic system has detected a problem that could range from a minor issue, like a loose gas cap, to a more serious concern, such as engine misfires or transmission failures. Ignoring these warnings can lead to escalating problems, potentially resulting in costly repairs or even compromising your safety on the road. For instance, a malfunctioning engine component could lead to decreased performance or, in severe cases, engine failure, which could leave you stranded or cause dangerous situations while driving. Therefore, it is essential to address the Check Engine Light promptly by using a compatible diagnostic scanner to identify the specific trouble codes. This proactive approach not only helps in maintaining the health of your Acura TLX but also ensures that you are driving a safe and reliable vehicle.

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