2013 Buick Verano Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2013 Buick Verano: Common Causes and Solutions

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Reviewed by
Andrew Hajjar
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 2013 Buick Verano 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 2013 Buick Verano 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 2013 Buick Verano?

When faced with a check engine light on your 2013 Buick Verano, the first step is to assess the situation carefully. Begin by checking if the light is flashing; a flashing light signals a serious issue that requires immediate attention. Next, inspect the gas cap, as a loose or damaged cap is a common culprit for triggering the light. If the gas cap is secure, utilize an On-Board Diagnostics (OBD) scanner to read any trouble codes, which can provide specific insights into the problem. It's also wise to consult your vehicle's manual for tailored troubleshooting advice. If the initial checks do not reveal the issue, consider testing the evaporative emissions (evap) system, as this can often be linked to check engine light alerts. Understanding that the check engine light indicates a fault detected by your vehicle's system will help you approach the diagnosis methodically, starting with simpler fixes before delving into more complex diagnostics. By following these steps, you can effectively narrow down the cause of the check engine light and take appropriate action.

What are the common problems that could cause the check engine light to illuminate in a 2013 Buick Verano?

When the check engine light comes on in a 2013 Buick Verano, it can be a source of concern for any DIY car owner. One of the most straightforward issues to check is the gas cap; a loose or damaged cap can easily trigger the light, so ensuring it is securely fastened is a good first step. If that doesn’t resolve the issue, consider inspecting the oxygen sensor, as a faulty one can lead to decreased fuel efficiency and increased emissions. Additionally, problems with the catalytic converter can also cause the light to illuminate, often indicating a more serious issue that may require professional attention. Spark plugs and ignition coils are other common culprits; worn or malfunctioning components can lead to engine misfires, which are easily detectable through rough idling or performance issues. Lastly, the mass airflow sensor plays a crucial role in maintaining the correct air-fuel mixture, and any malfunction here can also trigger the check engine light. By systematically checking these components, DIY enthusiasts can often identify and address the underlying problems, ensuring their Buick Verano runs smoothly and efficiently.

How urgent is it to address the check engine light in a 2013 Buick Verano?

When the check engine light in your 2013 Buick Verano begins to flash, it signals a serious issue that demands your immediate attention. This warning is not just a minor inconvenience; it can indicate problems such as engine misfires, which can lead to severe engine damage if left unchecked. Ignoring a flashing light can escalate the situation, resulting in costly repairs and potentially compromising your vehicle's safety and performance. Therefore, it is crucial to diagnose the underlying issue as soon as possible, whether through a professional mechanic or by using an OBD-II scanner for a DIY approach. Addressing the problem promptly not only helps maintain your vehicle's reliability but also ensures your safety on the road.

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