2019 Chevrolet Colorado Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2019 Chevrolet Colorado: 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 Colorado 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 Colorado 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 steps to diagnose the check engine light on a 2019 Chevrolet Colorado?

To effectively diagnose the check engine light on your 2019 Chevrolet Colorado, start with a thorough visual inspection of the vehicle. Check the gas cap to ensure it is securely tightened, as a loose cap can often trigger the light. Next, examine the engine bay for any visible damage to wires or hoses that could indicate a problem. If no obvious issues are found, the next step is to utilize an OBD-II scanner, which you can connect to the vehicle's diagnostic port. This tool will retrieve error codes from the engine control unit, providing insight into the underlying issues. Once you have the error codes, research them using your vehicle's manual or reputable online resources to understand their implications. Depending on the codes, you may need to address specific components such as sensors or the catalytic converter. After making the necessary repairs, use the scanner to clear the error codes and reset the check engine light. Finally, monitor the light over the next few days to ensure it remains off, confirming that the issue has been resolved. This methodical approach not only helps in identifying the problem but also empowers you to take control of your vehicle's maintenance.

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

When the check engine light comes on in a 2019 Chevrolet Colorado, it can be a source of concern for any DIY enthusiast. One of the most straightforward issues to check is the gas cap; a loose or damaged cap can easily trigger the light, so ensure it is tightened properly. If that’s not the culprit, consider inspecting the oxygen sensor, as a faulty one can lead to poor fuel efficiency and may require replacement. Additionally, problems with the catalytic converter can also illuminate the check engine light, often indicating a need for professional evaluation. Spark plugs are another common issue; worn or faulty plugs can affect engine performance and should be checked regularly. The mass airflow sensor is crucial for maintaining the correct air-fuel mixture, and any issues here can also cause the light to activate. Lastly, keep an eye on the ignition coil and engine misfires, as these can lead to rough idling and further complications if not addressed. While some of these issues can be tackled at home, it’s wise to consult a qualified mechanic for a thorough diagnosis to prevent any potential damage to your vehicle.

What should I do if the check engine light comes on in my 2019 Chevrolet Colorado?

When the check engine light illuminates in your 2019 Chevrolet Colorado, it’s crucial to act promptly, as neglecting this warning can lead to serious safety risks and costly repairs. A flashing check engine light signals a severe problem that demands immediate attention; if you encounter this, safely pull over and turn off the engine to prevent further damage. Even if the light is steady, it’s wise to start with simple checks, such as ensuring your gas cap is secure, as a loose or damaged cap can often trigger the warning. If the light persists, it’s advisable to seek professional diagnostics, as specialized equipment is needed to accurately read the error codes from your vehicle’s computer system. Addressing the identified issues promptly is essential; ignoring them can escalate into more significant problems that compromise your vehicle's performance and safety. Regular maintenance is also key in preventing future occurrences of the check engine light, so adhere to the maintenance schedule outlined in your owner’s manual. By taking these steps, you can maintain the reliability of your Chevrolet Colorado and ensure a safer driving experience.

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Check Engine Light Causes for 2019 Chevrolet Colorado