2015 Kia Soul: engine overheating

Filed Jun 15, 2026 · Engine, Transmission · FL

The vehicle is a 2015 Kia Soul with the 1.6L GDI engine. The check engine light came on solid, and a dealer later confirmed diagnostic trouble code P0420, indicating the catalyst system efficiency is below threshold on bank 1. The catalytic converter and engine are still on the vehicle and available for inspection upon request. This condition matches the defect described in Kia’s SC176 safety recall for 2012–2016 Soul vehicles with the 1.6L GDI engine, in which overheating of the catalytic converter can lead to internal engine damage and even a fire. My concern is that a failing catalytic converter or related engine damage could lead to sudden loss of power, engine failure, or fire while driving, which puts my safety and the safety of others at risk. The problem has been confirmed by an authorized Kia dealer, which documented the solid check engine light and DTC P0420 on a written repair estimate. In that document, the dealer referenced recall SC176Y as the possible applicable recall and noted that it would need to contact Kia for coverage because the vehicle has a branded rebuilt title. To my knowledge, the manufacturer has not yet performed any SC176‑style ECU logic update, compression test, or catalytic converter/engine inspection on this vehicle, and the manufacturer has declined to escalate or review recall coverage for this defect. The check engine light and P0420 code remain the primary warning indicators, and they first appeared shortly before the dealer visit on the repair estimate date.

Filed May 21, 2026 · Engine, Transmission · MN

On the highway, not reaching speed at expected RPM, try increasing power and RPM stops climbing at 3500, and speed decreases suddenly, car starts bucking, check engine light flashing. I pull over, stop, and keep going after several minutes idling with no apparent issue continuing. I take the car to get a computer check of the engine light code, P0420 for catalytic converter efficiency. Take car to dealer, they diagnose the converter as being both melted and clogged, quote me $4200 to replace with OEM part. Go to get second opinion at another service center, they confirm converter diagnosis and additionally diagnose cause as relating to outdated ECU software causing converter overheating, something which was an active recall for Kia Soul vehicles from MY 2012-2016, but only the 1.6L models. My vehicle is a 2.0L model with the exact same issue causing the exact same result, but with no recall, the converter is shot and there is no accountability for replacing the damaged part and updating the faulty software, as well as for missing this faulty software in the first diagnostic.

Filed Dec 1, 2025 · Engine · 123,000 miles · NY

The contact owns a 2015 Kia Soul. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power, with smoke coming from the engine compartment. The check engine warning light was illuminated. The contact pulled into a parking lot, where the engine overheated, and there was oil leaking from the vehicle. The vehicle was towed to an independent mechanic, where it was diagnosed and determined that the engine had failed and needed to be replaced. The engine was replaced. The contact stated that later, while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken back to the mechanic, where it was diagnosed and determined that the catalytic converter had failed and needed to be replaced. The vehicle was not repaired. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 123,000.

Filed Mar 31, 2025 · Acceleration, Engine · PA

High temperatures catalytic converter code went on the car was stalling on the highway as soon as I hit 60 MPH as I was getting on the car will not accelerate like if the engine was going to come out which also caused my car to overheat which was smelling like burnt oil called the dealer regarding this issue and compared to the recalls on the other KIA which is exactly what's happening to my car.

Filed Mar 4, 2025 · Engine · 115,000 miles · AR

The contact owns a 2015 Kia Soul. The contact stated that the check engine warning light was illuminated intermittently. The contact received notification of the federal safety agency Campaign Number: 19V120000 (Engine, Engine and Engine Cooling); and the Catalytic Overheating Protection Engine Control Unit logic was updated to prevent overheating of the catalytic converter. After the recall repair was completed, the failure persisted. The contact took the vehicle to a certified mechanic, who diagnosed that the catalytic converter needed to be cleaned. The vehicle was not repaired. The check engine warning light remained constantly illuminated. The manufacturer was not informed of the failure. The failure mileage was 115,000.

Filed Nov 5, 2024 · Engine · 96,643 miles · MD

The contact owns a 2015 Kia Soul. The contact stated while driving at an undisclosed speed, the vehicle stalled with no warning light illuminated. The contact noticed a knocking sound coming from the engine. The vehicle was able to restart however the failure recurred. The vehicle was taken to the dealer where it was diagnosed that the Catalytic Overheating Protection Engine Control Unit had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the issue and a case was opened. The vehicle was not repaired. The manufacturer was made aware of the failure and confirmed that the VIN was not included in the federal safety agency Campaign Number: 19V120000 (Engine, Engine and Engine Cooling). The approximate failure mileage was 96,643.

Filed Jun 12, 2024 · Transmission · 133,000 miles · FL · fire

The contact owns a 2015 Kia Soul. The contact stated that the vehicle began decelerating and vibrating while driving at approximately 40-45 MPH. When attempting to accelerate forward and switch lanes, the vehicle would hesitate to respond as the check engine warning light illuminated. The vehicle began overheating causing smoke to come from underneath the hood of the vehicle. The vehicle stalled in the middle of the road. The contact waited until the smoke dissipated and the vehicle cooled down before moving the vehicle to the side of the road. There were no injuries sustained. A police report was not filed. The vehicle was towed to the contacts residence and the following day it was towed to a dealer where it was diagnosed that the catalytic converter needed to be replaced. The vehicle was not repaired. The vehicle was then taken to an independent mechanic who replaced the catalytic converter and diagnosed that the engine needed to be replaced. The vehicle was not repaired and was towed back to the same dealer. The manufacturer was made aware of the failure. The failure mileage was 133,000.

Filed Apr 23, 2024 · Acceleration, Fuel system · FL

My catalytic converter failed just under 4 years after getting the SC176 recall done in July 2020. I believe it's possible there was a step missed in the replacement of my catalytic converter related to the recall, specifically the Catalytic Overheating Protection Engine Control Unit logic that may have caused the converter to fail. I do not detect that on the attached receipt from the repair that was done for the recall. Although there were no safety issues that happened, after reading the recall and what can happen as a result of the catalytic converter failing, I am concerned for my safety if I drive it any longer in that condition. The problem has been diagnosed by my local Kia dealership on Friday 4/19/24 and that is where the car is presently. I have attached the inspection report and the cost to fix it. The vehicle has not been inspected by anyone other the Kia dealership. There was a ticking sound when I accelerated that wasn't there before on 4/3. The service engine light came on Thursday 4/4 when I was getting my routine oil changed. I changed the PCV valve and the light went off until approximately 4/17 and then I called the dealership to schedule bringing it in for the diagnosis which was 4/19. This is the only information I have at this time. Any help you can provide will be greatly appreciated.

Filed Apr 12, 2024 · Engine · MO

On April 11, 2024, customer's check engine light came on on his 2015 Kia Soul. It was clear, dry, and fair temperature day. Owner was returning home from a routine trip from work on an outer road to a highway. The next day the vehicle was taken to Firestone Auto Service which ran a diagnostic report and found that the catalytic convertor was the issue (SEE FIRESTONE UPLOAD). Firestone recommended vehicle be taken back to original dealer to address the issue since there was a recall. Records show that the dealership addressed the February 2019 catalytic recall on 5/2/2019 (SEE KIA DOC UPLOAD). KIA Customer Service told owner that KIA is not liable to address the catalytic converter problem under warranty (free) because they had already closed out the recall on this particular vehicle on 5/2/2019. CUSTOMER COMPLAINT: Kia should be liable to fix the catalytic converter problem at no charge to the owner because the recall service done has failed to prevent the overheating of the catalytic converter. The KIA Soul had only 75,822 miles on it when this issue was discovered.

Filed Mar 15, 2024 · CA

Catalytic converter failure despite recall repair (#19v120). Catalytic converters may become damaged due to overheating. This issue can increase the risk of engine stall or fire. Yes. On March 13, 2024 the vehicle was inspected by a certified Kia mechanic and it was determined that the primary catalytic converter and exhaust manifold have failed. Yes. I don't recall whether or not there was a warning light in 2019 before recall repair however there was a warning light in November 2023 continuing to the present.

Filed Feb 8, 2024 · Engine · OR

Starting in summer of 2021, I began to has acceleration problems with my car and a check engine light came on. It was undrivable so I took it to the closest mechanic I could make it to, Firestone. They found the catalytic converter to be the problem and I paid $1100 to replace it. Later in 2021, the catalytic converter went out again and I had to have the engine coil and spark plugs replaced. I took it back to Firestone to replace it under warranty. During 2022, the check engine light came on again and again it was the catalytic converter. I got it replaced under warranty again. During this replacement, Firestone let me know that my engine was the source of why the catalytic converter keeps going out. The compression was too low and the engine was causing the catalytic converter to overheat. I took it to the dealership to have it diagnosed to see what was wrong in the engine. They claimed to have run diagnostics in the entire engine and only found that the engine coil and spark plugs needed replacement. I had both of those things replaced already the year before. They did not identify any problems with the new catalytic converter or any other part of the engine. The check engine light came on and my catalytic converter has gone out again and caused me to lose acceleration on a one lane each way 60mph road on my way to work. I suddenly slowed way down and cars had to swerve around me. I pulled off onto a farm road to let traffic by and then had to hobble to AutoZone nearby with my hazards on to get my check engine light codes read. It came up that the cat converter was having issues. I looked up to see if my car had any recalls and none were found. I did find that there was a major recall for Kia souls 2012-2018s for some piece of the engine that was causing catalytic converters to overheat. Many individuals who had this recall done to their vehicles also had to have engine coils and spark plugs replaced based on a forum regarding this recall.

Filed Jan 16, 2024 · Engine · PA · fire

THE DEFECT MAY CAUSE DAMAGE TO THE CATALYTIC CONVERTER DUE TO OVERHEATING, RESULTING IN ABNORMAL ENGINE COMBUSTION AND DAMAGE TO THE ENGINE PISTONS. PISTON DAMAGE CAN RESULT IN A STALL, INCREASING THE RISK OF A CRASH. IF A PISTON ROD BREAKS AND PUNCTURES THE ENGINE BLOCK, OIL CAN ESCAPE, INCREASING THE RISK OF A FIRE. The engine caught on fire while I was driving on the highway. I was sold this car without being told of any recalls. The dealership has refused to take responsibility for not informing me of the recall. Kia cooperate office has minimal contact with me. They are currently having it towed to a Kia dealer for diagnostic testing. Currently I own $400.00 just for the rental.