2015 Kia Soul transmission problems

Filed Oct 8, 2026 · Engine, Transmission · PA

My husband purchased our 2015 Kia Soul 1.6L GDI in 04/18. It was recalled under the federal safety agency 19V120 & Kia SC176 in 04/19. The recommended fix? Update ECU Logic. Completed: 04/24/19. Check engine light came in 07/19. My appointment in 08/19, at #1 Cochran Kia showed a P0455 large leak code. Per invoice, manual leak test found no leak, but found gas cap not installed correctly after adding fuel, codes were cleared, & road test performed; "mileage in": 65582, "mileage out": 65583. Was that a road test? In 01/20, the Soul at the dealer for check engine light; P050A code was found & there was no resolution. They sent me home with the check engine light on. Auto Zone recommended catalytic cleaners. I used these because the illuminated check engine light created stress & still does. Auto Zone found another P0420 code for replace catalytic converter on 08/21. More cleaners. 01/22 Auto Zone found replace ignition coils & spark plugs. 04/22 extended warranty expire At dealer on 01/23, for a check engine light. A catalytic converter replace was recommended for $2,199.95. I could not afford that. More cat cleaner. Auto Zone found P0420 code on 06/23. Cat cleaner did not work. I found a cat for $379.80 & asked an auto tech to install. Codes cleared only for a little while. I kept using catalytic cleaner. Soul's mileage was greater than max of 150,000 during '23 settlement. On 09/28/26, the car slowed down when accelerating up hill & check engine light began blinking. Stressed, 3 friends & I were picked up by another friend. At home, P0300 led to spark plugs & ignition coils being replaced & a possible exhaust leak. An appointment is scheduled on 10/14/26 but the dealer plans to charge a diag. fee for $190. Kia released SC176Y an extension to SC176, directing dealerships to replace catalytic converters & parts of the engine if a car is exhibiting the P0420 & P0300 codes after the 2019 ECU logic update. Can my VIN have these replaced? The original cat converter is available.

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 Jan 13, 2026 · Electrical, Engine · SC

The engine warning light illuminated and the vehicle began to hesitate and lose power while driving, making the vehicle unsafe to operate. The problem involves the engine and powertrain. A Kia dealer inspected the vehicle and found a timing-related engine fault code (P0014). The dealer stated the condition is consistent with the Kia engine bearing failure recall and referenced recall SC200PS, but said this VIN was not included. The vehicle has reduced power and cannot be safely driven. This creates a safety risk because the engine can lose power without warning while the vehicle is in motion. Warning lights were present before and during the failure. The vehicle has not been repaired and is available for inspection.

Filed Dec 25, 2025 · Engine, Fuel system · NY

Code P1326 Popped up - my mechanic replaced the P1326 Knock Sensor for the Kia. Code P1326 Popped up 2nd time - replaced sensor again. Code P1326 popped up and now there is some knocking. Check engine light flashing - then went off for a while after part was replaced, and then back on again, and off again and back on. There are many Kias listed for RECALL with this code, same year and model. Yet mine is not under RECALL. It says to reach out and ask for an ECU update and that Kia should cover an extended warranty for this KNOWN issue.

Filed Sep 23, 2025 · Engine, Transmission · GA

The engine in my 2015 Kia Soul was replaced under warranty in June 2025. Only 3,568 miles later, the replacement engine failed. The vehicle displayed code P1326 and quickly lost oil, leaving it unsafe and undriveable on the road. This sudden failure created a serious safety hazard, as the vehicle stalled without warning and could not maintain safe operation. I was fortunate to be close to home and immediately turned back, narrowly avoiding a dangerous situation on a busy road. provide any assistance. Instead, they declined to repurchase or replace the vehicle, leaving me with an undriveable car and a $9,900 loan balance. This second catastrophic failure has not been inspected by a Kia dealership because Kia refused to take responsibility or even arrange for evaluation. This was not an isolated incident. Problems began on 11/27/2024, less than 3,000 miles after I purchased the vehicle, and have been ongoing ever since, including prior emergency towing events due to similar safety issues. Kia’s repeated failures to provide a lasting fix or safe remedy have left me without reliable transportation and have put both myself and other drivers at risk. I have full documentation of the June 2025 engine replacement, the subsequent failure, and Kia’s refusal to act. The vehicle remains available for inspection. Warning messages and engine lights appeared only after the failure had already occurred.

Filed Aug 6, 2025 · Engine, Transmission · ID

On [XXX] around [XXX], we were headed westbound on [XXX] toward Boise when the car began making a clanking sound. In less than a minute, the car was pouring smoke, clanking stopped and car completely failed. I coasted to side of freeway, car would not turn over, i did not try more than once for fear of further damage or starting a fire. When tow driver came and car was moved, it exposed a giant puddle of oil and pieces of what looked like MELTED metal. The tow driver stated it was a connection rod piece and engine is likely shot. I immediately scheduled a service ticket to have it looked at my local Kia Dealership. They confirmed that i experienced a catastrophic engine failure and that it matched the exact recall SC176 issue. They attempted to contact and file a claim under both the recall and the powertrain warranty and were denied both by KIA, due to negligence of the owner. I had a passenger with me who has severe medical conditions. It was in 90's in desert like heat. It took 4-5 hours to have it towed and get out of the heat. We almost got into an accident when the car malfunctioned. There were ZERO warning notifications or lights on the dashboard until the car completely went disabled while coasting to the side of the freeway. No warning chugs. No previous issues with smoke/warning lights/ nothing prior. This literally happened out of no where and now I am being told by KIA they will not repair because its MY JOB to look into recalls. I have lived at the same address for the whole time i owned the car. I have printed records and digital records from my local DMV to prove it. I have written and digital proof that i properly maintenance my vehicle on time AND that i paid for synthetic oil rather than just the lowest possible choice they offered. I have proof that I was notified for the recall regarding the steering issue in 2017 and that i immediately made a service appt with my local dealership to have it address. I received NO notice for any other recall INFORMATION REDACTED PURSUANT TO THE FREEDOM OF IN

Filed Jun 10, 2025 · Engine, Transmission · 77,000 miles · MI

The contact owns a 2015 Kia Soul. The contact stated while driving approximately 60 MPH, the transmission unexpectedly downshifted, and the vehicle decelerated while the accelerator pedal was depressed. No warning light was illuminated. In addition, while driving approximately 40 MPH, the vehicle failed to accelerate as intended while the accelerator pedal was depressed. The vehicle was taken to a local independent mechanic to be diagnosed. The vehicle was diagnosed with engine failure. The vehicle was taken to a local dealer for a second opinion, and the vehicle was diagnosed and determined that the catalytic converter needed to be replaced. The vehicle remained with the local dealer but was not repaired due to the cost. The manufacturer was made aware of the failure. The failure mileage was approximately 77,000.

Filed May 21, 2025 · Engine, Transmission · IA

My 2015 Kia Soul is experiencing ongoing, severe oil consumption. Despite having an extended warranty for rod bearing failure (15 years/150,000 miles), my Kia dealership refuses to perform an oil consumption test because my vehicle has slightly exceeded 100,000 miles (currently at ~106,500). I brought the vehicle in multiple times for oil loss before reaching 100,000 miles, but no one informed me that a test existed or was needed. The car burns through oil every 3,000 miles or less, sometimes with no oil showing on the dipstick before the next change. It often chugs or knocks, but no warning lights currently appear. I previously received engine codes P1326, P0011, and P0014, and I did receive the KSDS update. The dealership told me I must wait for the engine to fail to qualify for replacement. This is unsafe for me and other drivers. Kia Consumer Affairs has confirmed I’m under warranty, but no solution has been offered to prevent a dangerous breakdown. I am concerned that this is a widespread issue that is being ignored unless the vehicle fails completely. I’ve been instructed by Kia service staff to continue topping off oil to avoid engine damage. However, by doing so, I am also preventing the P1326 code from triggering—effectively disqualifying me from warranty help. I’m forced to choose between protecting my car or triggering a code to qualify for repair. This puts consumers at risk and creates an unfair barrier to accessing the warranty coverage Kia advertises.

Filed Dec 23, 2024 · Acceleration, Engine · 144,000 miles · AR · fire

Description of Incident: The engine has experienced a failure that causes oil to blow back from the engine, covering components both under and outside of the engine cover. This has resulted in oil accumulating on the exhaust and other hot components, creating a significant fire hazard. Safety Risks: This malfunction poses a serious risk to my safety and the safety of others, as the oil leakage could lead to a fire while driving. Additionally, the vehicle stalls at various speeds, which increases the risk of accidents or harm to other drivers and pedestrians. There is also a strong smell of oil inside the car, potentially indicating harmful fumes entering the cabin. Inspection Availability: The component/system causing the issue is available for inspection upon request. Reproduction and Confirmation of the Problem: The issue has been reproduced and confirmed by two SAE-certified mechanics. Inspection by Others: The vehicle has been inspected by two SAE-certified mechanics but not yet by the manufacturer, police, or insurance representatives. Warning Signs Prior to Failure: Warning signs included consistently losing oil even after a fresh oil change, smoke from under the hood, a strong oil smell inside the cabin, and the car stalling during operation. These symptoms have been ongoing and progressively worsening, with the vehicle now stalling more frequently.