2015 Kia Soul power train problems

“My husband purchased our 2015 Kia Soul 1.6L GDI in 04/18. It was recalled under the NHTSA 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.…”

“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…”

“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.”

“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.”

“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.”

“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…”