2020 Chevrolet Colorado Has A Check Engine Light

Resolve Check Engine Light Issues in 2020 Chevrolet Colorado

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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 2020 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 2020 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 initial steps to diagnose the check engine light on a 2020 Chevrolet Colorado?

When faced with a check engine light on your 2020 Chevrolet Colorado, the first step is to check for visible issues, particularly the gas cap, as a loose or damaged cap is a common culprit that can easily trigger the light. If everything appears secure, the next step is to utilize an OBD-II scanner, which can be connected to the vehicle's diagnostic port. This tool will provide you with specific error codes that indicate the nature of the problem. Once you have the error code, take the time to research its meaning, either through the vehicle's manual or reputable online resources, to gain insight into the potential issues at hand. Additionally, pay close attention to your vehicle's performance; any unusual noises, vibrations, or changes in driving behavior can offer valuable clues about the underlying problem. By following this structured approach, you can effectively diagnose the check engine light and determine the necessary steps for resolution.

What are the common problems that could cause the check engine light to illuminate in a 2020 Chevrolet Colorado?

When the check engine light comes on in a 2020 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 the gas cap is secure, consider inspecting the oxygen sensor, as a faulty sensor can lead to poor fuel efficiency and may require replacement. Another critical component to examine is the catalytic converter; if it is failing or inefficient, it can cause the check engine light to illuminate. Additionally, worn-out spark plugs can affect engine performance, so checking their condition is essential. The mass airflow sensor is another potential culprit, as issues here can disrupt the air-fuel mixture, leading to engine performance problems. Lastly, keep an eye on the ignition coil and engine misfires, as these can also trigger the check engine light. Addressing these common problems promptly can help maintain your vehicle's performance and prevent further damage. If you are unable to resolve the issue, consulting a qualified mechanic for a thorough diagnosis is always a wise choice.

How urgent is it to address the check engine light in a 2020 Chevrolet Colorado?

Addressing the check engine light in a 2020 Chevrolet Colorado is not just a matter of convenience; it is a critical step in ensuring the vehicle's safety and longevity. Ignoring this warning can lead to serious repercussions, including extensive engine damage and costly repairs. The check engine light is designed to alert drivers to potential issues within the engine or emissions system, and delaying action can exacerbate these problems, leading to reduced fuel efficiency and increased emissions. Moreover, modern vehicles are equipped with advanced diagnostic systems that can help identify the specific issue, making it easier to resolve. Therefore, it is essential to prioritize a prompt inspection by a qualified mechanic to mitigate risks and maintain optimal vehicle performance. Taking immediate action not only protects your investment but also contributes to a safer driving experience and a healthier environment.

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2020 Chevrolet Colorado Check Engine Light Solutions