2008 Acura TL Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2008 Acura TL: 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 2008 Acura TL 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.

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Tuffy Tire & Auto Service Center - Grandview

4.7
(85)
2.39 mi
1524 W 5th Ave
Columbus, OH
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Closes 5:00 PM
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Excite Auto Repair & Towing

4.4
(15)
5.94 mi
3430 Westerville Road
Columbus, OH
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All In Auto Service

4.9
(25)
6.56 mi
5200 Fisher Road
Columbus, OH
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Closes 6:00 PM
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Tuffy Tire & Auto Service - Grove City

4.4
(520)
6.67 mi
2131 Stringtown Rd
Grove City, OH
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How much does it cost to fix a 2008 Acura TL 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 steps to diagnose the check engine light on a 2008 Acura TL?

To effectively diagnose the check engine light on your 2008 Acura TL, start by utilizing an OBD-II code scanner, which will provide you with specific trouble codes that indicate the underlying issues. This initial step is crucial as it helps pinpoint the problem without unnecessary guesswork. Once you have the codes, locate the OBD plug, typically found under the dashboard near the steering column, to connect your scanner and retrieve the data. After identifying the codes, check for common culprits such as faulty spark plugs, a malfunctioning catalytic converter, or a loose gas cap, as these are often the simplest issues to address. If the VSA light is also illuminated, a quick reset by turning the vehicle off and on may resolve the issue. However, it’s essential to fix the root cause of the check engine light before attempting to reset it, ensuring that the problem does not persist. By following this structured approach, you can efficiently diagnose and potentially resolve the check engine light issue on your Acura TL, saving time and money in the process.

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

When the check engine light comes on in your 2008 Acura TL, it can be a source of concern, but understanding the common problems associated with this warning can empower you to take action. One frequent culprit is faulty spark plugs, which can lead to misfires and reduced engine performance. Additionally, a bad catalytic converter can cause significant issues, affecting your vehicle's emissions and fuel efficiency. Leaks in the coolant or antifreeze system may also trigger the light, indicating potential overheating risks. Other issues to consider include failing ignition coils, damaged plug wires, or even dead fuel injectors, all of which can disrupt the engine's operation. More serious problems, such as bent valves or a leaking head gasket, can also be at play, potentially leading to costly repairs if not addressed promptly. Lastly, poor electrical connections, including damaged wiring, can create intermittent faults that trigger the check engine light. By being aware of these common problems, you can take the first steps toward diagnosing the issue and deciding whether a DIY fix is feasible or if professional assistance is needed.

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

When the check engine light activates in your 2008 Acura TL, it is essential to recognize the urgency of the situation. This warning indicator is not merely a nuisance; it signifies that there is a potential issue with your vehicle's engine or emissions system that requires immediate attention. Ignoring this light can lead to more severe and costly repairs down the line, as minor issues can escalate into major problems if left unaddressed. For instance, a simple fix like a loose gas cap or a faulty oxygen sensor can affect your car's performance and fuel efficiency, ultimately leading to engine damage. Therefore, it is advisable to conduct a diagnostic check as soon as the light comes on. If you are a DIY enthusiast, consider investing in an OBD-II scanner to read the trouble codes, which can help you identify the specific issue. By taking prompt action, you not only safeguard your vehicle's health but also enhance its longevity and efficiency.

Related 2008 Acura TL Problems

Read about related problems experienced by other Acura TL drivers like you.

Check Engine and D4 Lights Flashing
The 1998-2014 Acura TL V6 may develop issues with the automatic transmission. Rough shifting may occur, and the “D4” light and check engine may begin to blink. The check engine light will also illuminate, and OBD trouble codes P0700, P0730, P0740, P0780, P1768 and/or P1768 will be stored in the computer. If the transmission shifts roughly, the failure is very likely mechanical failure of the transmission. If the transmission performs normally, a faulty sensor, or dirtytransmission fluid may be the case. In most cases, it is necessary to use professional diagnostic equipment to provide a diagnosis, and complete the repair. The longevity of the transmission is dependent on strict adherence to the manufacturer's recommendation for ATF replacement intervals and procedure.
17 model years affected
Avg Mileage: 1132,057
354 others reported problem
150 comments
Check Engine Light and Engine Takes too Long to Start
The 1998-2014 Acura TL commonly has problems with theEVAP canister vent solenoid. It stops responding to commands to open and close, and the following occurs:
  • Illumination of the check engine light
  • OBD trouble code P1457 is stored
  • Engine takes longer than usual to start
  • Fuel mileage decreases noticeably
  • The valve is located on the charcoal canister, and is meant to open and close upon command. It fails due to corrosion breaking one of two internal seals, which allows air to escape the system, signaling the OBD trouble code P1457. Correcting the problem can be done by replacing the vent valve, or, in some cases, cleaning and resealing the vent valve has been successful. You can get an estimate for this repair here. A worn, missing, or loose gas cap can cause the same issues.
    17 model years affected
    Avg Mileage: 1161,090
    21 others reported problem
    2 comments
    See More 2008 Acura TL Problems

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