Kia Sorento Ignition Coil Problems

The Kia Sorento has been a popular choice for drivers seeking a reliable and versatile SUV. However, despite its many strengths, some owners have experienced frustrating Kia Sorento ignition coil problems. 

These problems have ranged from melted ignition coil and engine misfires to stalling and loss of power, leaving many Kia Sorento owners feeling stranded and bewildered. 

After exploring several sources, we have found many owners experiencing frustration and inconvenience due to ignition coil problems. Here, we will discuss those issues and provide insights on how best to address them.

Read also: Common Weak Ignition Coil Symptoms You Should Be Aware Of

Kia Sorento Ignition Coil Problems

Kia Sorento Ignition Coil Problems

Owners have reported common issues related to the ignition coil of the Kia Sorento, which can arise from a range of factors including defective spark plug wires, electrical disturbances, and normal wear and tear. Check the common problems reported by owners below. 

Misfiring Cylinder

Many individuals affected by the Kia Sorento ignition coil problem have experienced misfires in cylinders 2 and 3, accompanied by a blinking check engine light. While there are various potential causes for this issue, the majority of reported cases attribute it to the bad ignition coils within the vehicle.

These faulty ignition coils can lead to problems with the overall performance of the Kia Sorento. The misfires in cylinders 2 and 3 not only result in a blinking check engine light but also cause rough idling, reduced power, and even stalling while driving.

The issue seems to primarily affect Kia Sorento models manufactured between 2011 and 2014. Owners have reported experiencing these problems after reaching around 80,000 miles on their vehicles. Ignition coil failures tend to be sudden and unexpected, leaving drivers stranded or compromising their safety on the road.

Unfortunately, this issue is not covered under Kia’s standard warranty or any official recall from the manufacturer. As a result, many frustrated consumers are left having to cover these expenses out of pocket.

Ignition Coil Burnt Out

Some Kia Sorento owners noticed the engine oil indicator and rear wobbliness, leading to a technician diagnosing burnt-out ignition coils and low transmission oil. They questioned the mileage impact on the ignition coil, comparing it to the Honda Accord’s reliability. 

The vehicle’s early production complicates mileage comparison. The 2011 Kia Sorento with 122,500 miles exhibited engine and transmission issues, requiring ignition coil and transmission axle seal replacements. 

A burnt coil is unexpected if the plugs are replaced already, but as the oil warning light comes on, it indicates low engine oil or a faulty oil pump, which could lead to a worn plug, which could lead to a burnt coil.  

If you notice that the oil warning light has been illuminated on your dashboard, it is crucial to check the engine oil level immediately. Insufficient oil can cause friction and heat, leading to increased wear on various components, including spark plugs.

Worn-out spark plugs cannot efficiently ignite the fuel-air mixture in each cylinder, resulting in incomplete combustion. This incomplete combustion can create excessive heat within the cylinders, causing stress and potential damage to other ignition system components such as coils.

Melted Ignition Coil

Kia Sorento owners often complain about a short in the ignition wire causing the fuse to blow, leading to rough running, a non-working tachometer, and a melted coil. It remains uncertain to many of them why the ignition coil in Kia Sorento melts down frequently, associated with wiring issues.

One theory suggests that the ignition wire’s short circuit happens due to a faulty design or weak insulation in certain Kia Sorento models. The consistent heat generated by the engine could potentially degrade the wire’s protective covering, allowing it to come into contact with other components and cause a short.

As this problem persists, it leads to various symptoms that frustrate Kia Sorento owners. The most noticeable one is rough running during start-up and while driving. The vehicle may struggle to maintain a smooth idle, resulting in vibrations and an overall poor driving experience.

Additionally, affected owners often report issues with their tachometer – a device used to measure engine speed in revolutions per minute (RPM). A blown fuse triggered by the short circuit can disrupt electrical signals responsible for accurate RPM readings. Consequently, drivers find themselves unable to monitor their engine performance effectively as they navigate the roads.

How to Fix Ignition Coil Issues in Kia Sorento

One of the most bothersome facts regarding ignition coil issues is that they often seem to stem from other sources or faults. So, the first thing you have to do is identify or confirm the bad ignition coil in the vehicle. 

If you find a bad ignition coil, the safest option is to replace that one. Here, we’ll highlight both of these. Let’s see:

Diagnosing Bad Ignition Coil 

Diagnosing a bad ignition coil in a Kia Sorento involves several key steps. Firstly, be on the lookout for common symptoms such as engine misfires, rough idling, and decreased fuel efficiency. 

Use an OBD-II scanner to check for specific diagnostic trouble codes related to ignition coil failure. Additionally, inspect the physical condition of the ignition coils for any signs of corrosion or damage.

Performing a spark test can also help determine if the ignition coil is functioning properly. Utilize a multimeter to measure the resistance of the ignition coil’s primary and secondary windings, comparing the results to manufacturer specifications. 

Keep in mind that testing procedures may vary based on the specific model year and engine type of your Kia Sorento.

It’s essential to consider other potential issues that could mimic ignition coil problems, such as faulty spark plugs or a malfunctioning fuel injector. Consult your vehicle’s service manual or seek assistance from a professional mechanic if you’re unsure about how to accurately diagnose and address suspected ignition coil issues.

Replacing Ignition Coil

To replace the ignition coil in a Kia Sorento, start by locating the coil pack on the engine. This is usually located near the top of the engine, with each cylinder having its coil. 

Next, disconnect the electrical connectors from the ignition coils and remove any fasteners securing them in place. Carefully lift out the old ignition coils, taking care not to damage any surrounding components.

Before installing the new ignition coils, it is important to inspect and potentially replace any worn spark plugs that may have contributed to the failure of the original coils. Once this has been done, carefully insert the new ignition coils into their respective positions and secure them with new fasteners.

Finally, reconnect the electrical connectors to each coil and ensure they are fully seated. Testing the vehicle to confirm the proper operation of the new ignition coils is recommended before completing the task. Always refer to your vehicle’s specific service manual for detailed instructions tailored to your model year and configuration.

Final Words

While the Kia Sorento is a well-regarded SUV in many respects, its recurring ignition coil problems present a significant challenge for owners. Staying vigilant about symptoms such as rough engine performance and addressing these issues promptly will be key to maintaining the vehicle’s overall reliability. 

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