2013 Lexus CT200h Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2013 Lexus CT200h: 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 2013 Lexus CT200h 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 CT200h 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 CT200h?

When faced with a check engine light on your 2013 Lexus CT200h, it's essential to adopt a systematic diagnostic approach. Begin by checking the gas cap; a loose or damaged cap is a common culprit that can easily trigger the light. Next, take a moment to inspect your dashboard for any additional warning lights or messages that might provide further insight into the problem. A visual inspection under the hood is also crucial; look for any obvious signs of damage to wires, hoses, or connectors that could indicate a more significant issue. If these initial checks do not resolve the light, using an OBD-II scanner is a vital next step. This tool will help you retrieve the specific error code associated with the check engine light, offering a clearer direction for troubleshooting. Once you have the code, researching its meaning can significantly aid in pinpointing the underlying issue. If, after these steps, the cause remains elusive or the problem appears complex, seeking the expertise of a mechanic is advisable to ensure proper diagnosis and repair. By following this structured approach, you can effectively address the check engine light and maintain your vehicle's performance.

What are the common problems that could cause the check engine light to illuminate in a 2013 Lexus CT200h?

When the check engine light comes on in a 2013 Lexus CT200h, it often indicates underlying issues that can be addressed with some basic DIY knowledge. One of the most frequent culprits is a loose gas cap, which can easily be checked and tightened to see if it resolves the warning light. Another common issue is a faulty oxygen sensor, which can affect fuel efficiency and emissions; while replacing this part may require some mechanical skill, it is a manageable task for many DIYers. Additionally, problems with the catalytic converter can trigger the light, and while this may be more complex to diagnose, understanding its role in emissions control can guide you in seeking professional help if needed. Spark plug wear is another factor that can lead to engine performance issues, and regularly inspecting and replacing spark plugs is a straightforward maintenance task that can prevent the check engine light from illuminating. Lastly, a malfunctioning mass airflow sensor can disrupt engine performance, and while testing and replacing this sensor may require specific tools, it is a feasible project for those willing to learn. By being aware of these common problems and taking proactive steps, you can maintain your vehicle's performance and potentially save on repair costs.

How urgent is it to address the check engine light in a 2013 Lexus CT200h?

When the check engine light illuminates in your 2013 Lexus CT200h, it is crucial to understand the urgency of the situation. This warning light is not just a minor inconvenience; it signals potential issues within the engine or emissions system that could escalate if left unaddressed. Ignoring this alert can lead to more severe problems, including costly repairs and decreased vehicle performance. For DIY enthusiasts, the first step is to use an OBD-II scanner to retrieve diagnostic trouble codes, which can help identify whether the issue is something as simple as a loose gas cap or a more complex engine malfunction. Addressing these codes promptly can prevent further damage and ensure your vehicle operates efficiently. Additionally, neglecting the check engine light can result in reduced fuel efficiency and may even pose safety risks while driving. Therefore, taking immediate action not only preserves the integrity of your vehicle but also enhances your driving experience. If the issue seems beyond your expertise, consulting a professional mechanic is advisable to ensure a thorough diagnosis and effective resolution.

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2013 Lexus CT200h Check Engine Light: Causes & Solutions