2010 Pontiac G6 Has A Check Engine Light

Resolve Check Engine Light Issues in Your 2010 Pontiac G6

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Reviewed by
Aisha
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 2010 Pontiac G6 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 2010 Pontiac G6 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 2010 Pontiac G6?

When diagnosing the check engine light on a 2010 Pontiac G6, it's essential to adopt a systematic approach that prioritizes simpler solutions before delving into more complex diagnostics. Start by visually inspecting the vehicle for any obvious issues, such as ensuring the gas cap is securely fastened and in good condition, as a loose or damaged cap can often trigger the light. Next, utilize an OBD-II scanner to connect to the vehicle's onboard diagnostic port; this tool will retrieve error codes that provide insight into the underlying problems. Make sure to document these codes, as they are crucial for identifying specific issues. Once you have the codes, research their meanings through the vehicle's manual or reputable online resources to gain a clearer understanding of the potential problems. Additionally, inspect basic components like spark plugs, ignition coils, and the air filter, as these can also contribute to the check engine light being activated. If these initial steps do not lead to a resolution, consider seeking professional assistance to ensure a thorough diagnosis and repair. By following this structured approach, you can effectively troubleshoot the check engine light and work towards a solution.

What are the common problems that could cause the check engine light to illuminate in a 2010 Pontiac G6?

When the check engine light comes on in your 2010 Pontiac G6, it can be a source of concern, but understanding the common issues can help you troubleshoot effectively. One of the simplest causes is a loose gas cap, which can disrupt the fuel system's pressure. If you notice the light, start by checking the gas cap to ensure it’s secure. Another frequent culprit is a faulty oxygen sensor, which can negatively impact fuel efficiency and emissions; replacing this sensor can often resolve the issue. Additionally, problems with the catalytic converter can trigger the light, indicating that it may be failing or inefficient. A dirty or malfunctioning mass airflow sensor can also affect the air-fuel mixture, leading to the check engine light illuminating. Furthermore, issues with spark plugs or ignition coils can cause engine misfires, prompting the warning light to activate. Lastly, a malfunctioning thermostat can lead to overheating, which is another reason the check engine light may appear. Addressing these issues promptly is crucial to maintaining your vehicle's performance and preventing further damage, so if the light remains on after checking these common problems, consider consulting a qualified mechanic for a thorough diagnosis.

How urgent is it to address the check engine light in a 2010 Pontiac G6?

Addressing the check engine light in your 2010 Pontiac G6 is not just a matter of convenience; it is a critical step in maintaining your vehicle's health and safety. Ignoring this warning can lead to serious repercussions, including costly repairs and diminished vehicle performance. The check engine light indicates that your car's onboard diagnostics have detected a fault, which could range from minor issues to significant problems that may compromise your safety on the road. For instance, trouble codes like P0102 can signal issues that affect engine performance and fuel efficiency, potentially leading to more severe engine damage if left unchecked. Therefore, it is essential to prioritize diagnosing and resolving the underlying issues indicated by the check engine light to avoid escalating problems that could jeopardize your vehicle's reliability and your safety. Taking timely action not only helps in preserving the longevity of your Pontiac G6 but also ensures a smoother and safer driving experience.

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