2019 Chevrolet Traverse Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2019 Chevrolet Traverse: 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 2019 Chevrolet Traverse 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 2019 Chevrolet Traverse 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 2019 Chevrolet Traverse?

When faced with a check engine light on your 2019 Chevrolet Traverse, it's essential to approach the diagnosis methodically. Start by visually inspecting the gas cap, as a loose or damaged cap is a common culprit that can easily trigger the warning light. If the gas cap appears secure, the next step is to utilize an OBD-II scanner, which can read the specific error codes associated with the light. This tool is invaluable for pinpointing the issue, as it provides detailed information about potential problems. Following this, check the fluid levels in your vehicle, including engine oil, coolant, and transmission fluid, since low levels can also activate the check engine light. Additionally, inspect the battery for any signs of corrosion or weakness, as battery issues can lead to electrical problems that trigger the light. Lastly, remain attentive to any unusual noises or odors while driving, as these sensory cues can help identify the underlying issue. By systematically following these steps, you can effectively diagnose the cause of the check engine light and take appropriate action to resolve it.

What are the common problems that could cause the check engine light to illuminate in a 2019 Chevrolet Traverse?

When the check engine light comes on in a 2019 Chevrolet Traverse, it can be a source of concern for any DIY car owner. One of the most frequent culprits is a loose gas cap, which can easily be checked and tightened to see if the light turns off. Another common issue is a faulty oxygen sensor, which affects fuel efficiency and may require replacement if identified as the problem. Additionally, problems with the catalytic converter can lead to significant performance issues, and while this may require professional assistance, being aware of it is crucial. Spark plug wear is another factor that can trigger the light, and inspecting or replacing spark plugs is a manageable task for many DIYers. The mass airflow sensor also plays a vital role in engine performance, and any malfunction here can lead to the check engine light illuminating. Lastly, a failing ignition coil can cause misfires and rough idling, indicating a need for further investigation. Addressing these issues promptly not only helps in turning off the check engine light but also ensures the vehicle runs smoothly, making it essential for DIY enthusiasts to familiarize themselves with these common problems.

How urgent is it to address the check engine light in a 2019 Chevrolet Traverse?

When the check engine light illuminates in your 2019 Chevrolet Traverse, it is essential to recognize the urgency of the situation. This warning signal can indicate a range of issues, from minor sensor malfunctions to serious engine problems that could compromise your vehicle's performance and safety. Ignoring this light may lead to decreased fuel efficiency and potentially escalate into more severe mechanical failures, resulting in costly repairs. For DIY enthusiasts, the first step is to use an OBD-II scanner to retrieve diagnostic trouble codes, which can provide insight into the specific issue at hand. However, it is crucial to understand that some problems may require professional expertise to ensure they are resolved correctly. By addressing the check engine light promptly, you not only safeguard your vehicle's longevity but also enhance your driving experience and safety on the road.

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