2018 Kia Soul: misfire or rough idle

Filed Oct 25, 2026 · Electrical, Engine · RI

**Vehicle:** 2018 Kia Soul\ **Mileage:** Approximately 198,000 miles 1\. What component or system failed or malfunctioned, and is it available for inspection upon request?** The engine appears to have experienced a serious malfunction, and the vehicle is no longer moving. I believe the engine may have failed. The vehicle is available for inspection upon request. 2\. How was your safety or the safety of others put at risk?** There is no immediate safety risk at the moment because the vehicle is not being driven. However, an unexpected loss of engine power or the inability to move could create a dangerous situation if it occurred in traffic. 3\. Has the problem been reproduced or confirmed by a dealer or independent service center?** No. The vehicle has not been inspected or diagnosed by a dealer or independent service center. The exact cause of the failure has not been confirmed. 4\. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others?** No. The vehicle has not been inspected by the manufacturer, police, insurance representatives, or any other party. 5\. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear?** The check engine light came on, and the vehicle showed misfire codes for cylinder 1 and cylinder 3, along with an oxygen (O2) sensor code. The vehicle was also producing a significant amount of white smoke from the exhaust. These symptoms occurred before the vehicle stopped moving. The exact cause has not yet been determined because the vehicle has not been professionally inspected.

Filed Jul 25, 2026 · Electrical, Engine · NC

The vehicle is suffering from an extreme internal engine oil consumption defect, burning approximately 3 quarts of engine oil every 500 to 600 miles with no external leaks. The internal oil burning heavily fouled the vehicle's ignition system (spark plugs and coil packs), causing severe engine misfires and a sudden vehicle stall while operating in motion on public highways. This unexpected loss of motive power creates an extreme safety hazard. The local dealership, Paramount Kia of Hickory, refused to follow proper factory Technical Service Bulletin (TSB-ENG219) testing protocols to document the defect, leaving the consumer operating an unsafe vehicle.

Filed May 4, 2026 · Electrical, Engine · DC

I am writing to report safety concerns regarding my 2018 Kia Soul Plus. I have been experiencing several engine issues, including knocking noises, hesitation during acceleration, excessive oil consumption, and an active check engine light. Recently, while driving with my daughter, the vehicle began shaking and the check engine light flashed three times. Although I strictly adhere to the recommended maintenance schedule, these issues persist. My mechanic identified code P0455, but a smoke test did not reveal a leak. Additionally, despite having a full tune-up in August [2025] at 105,636 miles, I am being told I require another tune-up due to engine misfires. I am concerned about the frequency of these repairs and the overall safety of the vehicle’s engine.

Filed Mar 24, 2025 · Engine · AZ

While climbing a hill, the engine began to sputter and lose power immediately, throwing multiple CEL codes. I was barely able to get it off the side of the road and shut the engine off. We were very lucky to be driving at a time when the road was not as busy as usual and experienced no collisions, though we were stranded on the side of a road with no cellular service for 2 hours before we could get towed. A mechanic reviewed the engine and suggested the piston rings blew and there was oil leaking from the exhaust manifold. Smoke was pouring from the rear of the engine, likely from it burning through the exhaust manifold, and the back of the engine was covered in oil and dripping out what oil was left in the engine at a rapid pace on the side of the road. This aligns with known issues for these engines involving oil consumption at unreasonable rates and the class action settlement for rod knock issues. The vehicle is able to be inspected. I am not comfortable starting the car as it continues to make horrible noises. The CEL codes produced were multiple misfires and individual cylinder misfires, P0300, P0301, P0302, P0303. The CEL illuminated after the engine lost power and made the noises, flashing repeatedly along with the oil indicator light. The oil light had not illuminated at all prior to indicate an issue with oil levels or pressure. Oil was present in the vehicle at acceptable levels approximately 95 minutes or 100 miles prior to the failure. Only the mechanic hired has looked at the engine so far.

Filed Mar 15, 2025 · Engine · PA

My 2018 Kia Soul burns oil creating the engine to misfire, stall, putter, tick. Ive had my oil changed on a Friday, and by Tuesday, there is no oil left in my engine. The local Kia dealership is currently doing an "oil consumption" test, however was alerted by Kia Corporate to not go any further unless I get them 7 years of my oil change records. My car is still under warranty. I have provided the oil change records. The local KIA dealership advised I drive my car if I need to, knowing there is a faulty engine, and that could cause harm or death! KIA does NOT stand by their warranty and tries to nickel and dime their good, loyal customers. They manufacture faulty engines, putting peoples lives at risk! My car is sitting at the dealership, waiting on approval from KIA while I am left with no car. Also, the dealer does not have any loaners available.

Filed Mar 1, 2025 · Engine · OH

While driving on the interstate @70mph with the cruise control activated and set the engine started without any warning to slow down. at this time the engine was sputtering, and the check engine light came on and we were unable to keep the car at speed. 12The vehicle was then driven about a mile to a KIA dealership. We were then told the engine had a multiple engine misfire and they would want the car for about 3 weeks to determine what happened. We then had the car towed to another mechanic who in a couple of days told us that there was no compression in cylinder #4 and the engine was blown.

Filed Jan 24, 2023 · Engine · MO

While driving down the highway, the engine began misfiring and making a grinding noise. The car started to die in the center of the highway and was losing engine power. This was incredibly dangerous as it was in the middle of the highway during a busy commute. The Kia dealership inspected it and said it was a defect with the engine, but they couldn't do it under a recall because they didn't update the firmware on the engine first. There were no warning signs, the car just died out of no where. The car had great engine upkeep before then.

Filed Jan 24, 2023 · Engine · MO

While driving down the highway, the engine began misfiring and making a grinding noise. The car started to die in the center of the highway and was losing engine power. This was incredibly dangerous as it was in the middle of the highway during a busy commute. The Kia dealership inspected it and said it was a defect with the engine, but they couldn't do it under a recall because they didn't update the firmware on the engine first. There were no warning signs, the car just died out of no where. The car had great engine upkeep before then.