2023 Jeep Grand Cherokee Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2023 Jeep Grand Cherokee: 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 2023 Jeep Grand Cherokee 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 2023 Jeep Grand Cherokee 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 steps to diagnose the check engine light on a 2023 Jeep Grand Cherokee?

When faced with a check engine light on your 2023 Jeep Grand Cherokee, the first step is to visually inspect for any obvious issues, such as ensuring the gas cap is securely fastened and undamaged, as this is a common trigger for the warning light. Next, utilizing an OBD-II diagnostic scanner is crucial; by connecting it to the vehicle's OBD port, you can retrieve specific error codes that indicate the nature of the problem. Once you have the error codes, take the time to research them, either through the vehicle's manual or reputable online resources, to gain insight into what might be malfunctioning. Additionally, inspecting basic components like the battery, spark plugs, and wiring for any signs of wear or damage can help identify potential issues. By following this methodical approach, you can effectively narrow down the cause of the check engine light and determine the best course of action for repairs.

What are the common problems that could cause the check engine light to activate in a 2023 Jeep Grand Cherokee?

When the check engine light illuminates in a 2023 Jeep Grand Cherokee, it can signal a range of common issues that are often manageable for DIY enthusiasts. One frequent culprit is a loose gas cap, which can disrupt the fuel system and is easily rectified by ensuring the cap is securely fastened. Another common issue is a faulty oxygen sensor, which not only affects fuel efficiency but can also lead to increased emissions; replacing this sensor can often be done with basic tools. Additionally, problems with the catalytic converter may arise, indicating a need for inspection or replacement if it is failing to function properly. Spark plug issues are also prevalent, as worn or faulty plugs can lead to engine performance problems, and changing them is a straightforward task for those familiar with engine maintenance. Furthermore, the mass airflow sensor can accumulate dirt or fail, triggering the light, and cleaning or replacing it is typically within the skill set of a DIY mechanic. Ignition coil malfunctions and engine misfires, which can stem from various factors including bad spark plugs or fuel injectors, are also potential triggers for the check engine light. Addressing these issues promptly can help maintain the vehicle's performance and efficiency, making it essential for owners to be aware of these common problems.

How urgent is it to address the check engine light in a 2023 Jeep Grand Cherokee?

When the check engine light illuminates in your 2023 Jeep Grand Cherokee, it is essential to recognize the urgency of the situation. This warning light is not merely a nuisance; it signals potential issues within the engine or emissions system that could escalate if left unaddressed. Ignoring the check engine light can lead to decreased fuel efficiency, increased emissions, and even severe engine damage, which may result in costly repairs. Moreover, some underlying problems could pose safety risks, such as engine stalling or compromised braking systems. Therefore, it is crucial to have your vehicle inspected by a qualified mechanic as soon as possible to diagnose the issue accurately. By taking prompt action, you not only safeguard your vehicle's performance and longevity but also ensure your safety on the road.

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2023 Jeep Grand Cherokee Check Engine Light Causes & Fixes