2013 Lexus LX570 Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2013 Lexus LX570: Common Causes and Solutions

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Reviewed by
Aisha
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 2013 Lexus LX570 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 2013 Lexus LX570 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 2013 Lexus LX570?

When faced with a check engine light on your 2013 Lexus LX570, the first step is to visually inspect the vehicle for any obvious issues, such as a loose or damaged gas cap, which is a common trigger for this warning. Next, utilizing an OBD-II diagnostic scanner can be incredibly helpful; by connecting it to your vehicle's onboard system, you can retrieve specific error codes that indicate the nature of the problem. Additionally, pay attention to any accompanying symptoms like unusual noises or performance changes, as these can provide further clues about the underlying issue. Consulting your owner's manual can also be beneficial, as it often contains valuable information on interpreting error codes and common problems associated with the check engine light. If these initial steps do not lead to a resolution, or if the problem appears to be more complex, it may be time to seek assistance from a qualified mechanic or dealership to ensure proper diagnosis and repair. By following this structured approach, you can effectively narrow down the potential causes of the check engine light and take informed steps toward resolving the issue.

What are the common problems that could cause the check engine light to illuminate in a 2013 Lexus LX570?

When the check engine light comes on in a 2013 Lexus LX570, it can be a source of concern for any DIY car owner. One of the most straightforward issues to check is the gas cap; a loose or damaged cap can easily trigger the light, so ensuring it is secure is a good first step. If the gas cap is fine, the next likely culprit could be a faulty oxygen sensor, which plays a crucial role in monitoring exhaust emissions and fuel efficiency. Additionally, problems with the catalytic converter can lead to inefficiencies that activate the check engine light, making it essential to inspect this component if other simple fixes do not resolve the issue. Another area to consider is the mass airflow sensor, as its malfunction can disrupt the engine's air-fuel mixture, leading to performance issues. Furthermore, issues with spark plugs or ignition coils can cause misfires, which are often indicated by the check engine light. Lastly, a malfunctioning thermostat can also be a reason for the light to illuminate, affecting engine temperature regulation. Addressing these common problems promptly not only helps in maintaining the vehicle's performance but also prevents further damage, making it crucial for DIY enthusiasts to stay vigilant when the check engine light appears.

How urgent is it to address the check engine light in a 2013 Lexus LX570?

Addressing the check engine light in your 2013 Lexus LX570 is not just a matter of convenience; it is a critical step in maintaining your vehicle's health and safety. Ignoring this warning can lead to a cascade of issues, including decreased fuel efficiency and performance problems that could compromise your driving experience. More importantly, unresolved engine or emissions system problems can escalate into significant damage, resulting in costly repairs that could have been avoided with prompt attention. For DIY enthusiasts, it is essential to recognize that while some minor issues may seem manageable, the check engine light often signals deeper underlying problems that require professional diagnostics. Therefore, taking immediate action to investigate the cause of the light is crucial, as it not only protects your investment but also ensures your safety on the road.

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Common Causes for Check Engine Light in 2013 Lexus LX570