2022 Cadillac CT5 Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2022 Cadillac CT5: 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 2022 Cadillac CT5 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 2022 Cadillac CT5 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 2022 Cadillac CT5?

When faced with a check engine light on your 2022 Cadillac CT5, the first step is to conduct a thorough visual inspection. Start by checking the gas cap; ensure it is securely tightened and free from damage, as a faulty gas cap is a common culprit for triggering the light. Next, pay attention to any additional dashboard indicators or warning messages that may offer further insights into the issue. If the light persists, utilizing an OBD-II diagnostic scanner is a crucial next step. This tool connects to your vehicle's onboard system, allowing you to retrieve specific error codes that can guide your troubleshooting efforts. Additionally, take note of any unusual vehicle behavior, such as rough idling or stalling, as these symptoms can provide valuable context for diagnosing the problem. Finally, don’t overlook the importance of consulting your owner’s manual, which can help you interpret the error codes and suggest appropriate actions. By following these initial diagnostic steps, you can effectively narrow down the potential causes of the check engine light and take informed action towards resolving the issue.

What are the common problems that could cause the check engine light to illuminate in a 2022 Cadillac CT5?

When the check engine light comes on in your 2022 Cadillac CT5, it can be concerning, but understanding the common problems that may cause this warning can empower you to take action. One frequent culprit is a loose gas cap, which is an easy fix that can often be resolved by simply tightening or replacing the cap. Another common issue is a faulty oxygen sensor, which can lead to reduced fuel efficiency; if you're comfortable with basic repairs, you might consider replacing this sensor yourself. Additionally, problems with the catalytic converter can trigger the light, though this may require professional assistance due to the complexity of the system. Spark plug issues are also prevalent; worn or faulty spark plugs can affect engine performance, and replacing them is a manageable DIY task for those with some mechanical knowledge. Similarly, a malfunctioning mass airflow sensor or ignition coil can cause the check engine light to illuminate, both of which can be diagnosed and replaced with the right tools and guidance. Lastly, engine misfires and EGR valve problems are more serious issues that may require a deeper understanding of engine mechanics. While some of these repairs can be tackled at home, it’s crucial to have the right diagnostic tools and knowledge to ensure you address the correct issue, as ignoring the check engine light can lead to more significant problems down the line.

How urgent is it to address the check engine light on a 2022 Cadillac CT5?

When the check engine light illuminates on your 2022 Cadillac CT5, it is crucial to take immediate action rather than dismissing it as a minor inconvenience. This warning light is your vehicle's way of communicating that there may be underlying issues affecting its engine or emissions system, which could range from simple sensor malfunctions to more severe problems like engine misfires or overheating. Ignoring this alert can lead to further complications, including costly repairs and diminished vehicle performance. Moreover, some issues indicated by the check engine light can pose safety risks, making it imperative to diagnose and address them promptly. By taking the time to investigate the cause of the check engine light, you not only safeguard your vehicle's integrity but also enhance its fuel efficiency and overall reliability. Therefore, if you see that light glowing, prioritize a thorough check to ensure your Cadillac CT5 remains in optimal condition.

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