Acura ILX Has A Check Engine Light

Troubleshooting the Check Engine Light in Your Acura ILX: 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 Acura ILX 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 ILX 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 ILX

When faced with a check engine light in your Acura ILX, it's essential to adopt a systematic diagnostic approach that begins with the simplest solutions before delving into more complex issues. Start by checking for common culprits, such as a loose or damaged gas cap, which is often an easy fix that can resolve the light without further intervention. Next, consider using an OBD-II scanner to retrieve any trouble codes, as these codes provide valuable insights into the specific problems affecting your vehicle. Understanding the nature of the codes can help you prioritize your troubleshooting efforts. If the light is blinking, this indicates a more serious issue that requires immediate attention, as it may affect engine performance. Should the problem persist after addressing these initial checks, it may be time to consult a professional mechanic or your local Acura service department for a comprehensive diagnostic evaluation. By following this methodical approach, you can effectively narrow down the potential causes of the check engine light and take appropriate action to resolve the issue.

What Could Cause the Check Engine Light to Illuminate in an Acura ILX?

When the check engine light appears on your Acura ILX dashboard, it serves as a crucial alert that something may be amiss under the hood. One of the most frequent culprits is a faulty mass airflow sensor (MAF), which can disrupt the engine's air-fuel mixture, leading to performance issues. Additionally, a loose gas cap is often overlooked but can trigger the light due to fuel evaporation. Other potential issues include malfunctioning sensors, which can affect various engine functions, and worn-out spark plugs that may cause misfires. A failing catalytic converter can also be a serious concern, as it impacts emissions and engine efficiency. Furthermore, bad ignition coils can lead to poor engine performance, while an extremely dirty engine air filter can restrict airflow, causing the engine to run inefficiently. Addressing these problems promptly not only helps in maintaining your vehicle's performance but also prevents more significant issues down the line.

Why is the Check Engine Light On in an Acura ILX?

When the Check Engine Light illuminates in your Acura ILX, it serves as a critical alert that should not be ignored. Neglecting this warning can lead to serious consequences, including decreased vehicle performance, increased emissions, and potential damage to vital engine components. For instance, a faulty oxygen sensor, a common trigger for the light, can result in poor fuel efficiency and engine misfires, which may escalate into more significant issues if left unaddressed. Additionally, a blinking Check Engine Light often indicates a severe problem that could limit your vehicle's acceleration, posing safety risks while driving. Therefore, it is essential to prioritize a diagnostic check as soon as the light appears, ensuring that any underlying issues are resolved before they lead to costly repairs or unsafe driving conditions. Taking immediate action not only protects your vehicle's integrity but also enhances your overall driving experience.

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