2020 Kia Soul: misfire or rough idle

Filed Oct 15, 2026 · Engine · AL

On [XXX], my 2020 Kia Soul (2.0L Nu MPI, VIN [XXX], approximately 102,420 miles) suffered total engine failure: complete loss of motive power, stalled and would not restart. This is the exact defect covered by federal recall 21V259000 / Kia SC209 (piston oil rings causing engine damage and stalling). The SC209 recall remedy had already been performed on this vehicle at Kia of Daphne (Daphne, AL) in June 2026. The recall did not prevent the failure. Symptom history matches the defect: the vehicle has burned oil excessively its entire life (oil changed every 3,000 miles; oil like sludge by approximately 2,000 miles) - the textbook piston-ring symptom. Sputtering began June 2026; a spark-plug replacement bought two to three months before total failure. Diagnostic codes at failure: P0304 (cylinder 4 misfire), P219F (cylinder imbalance), P0014 and P0017 (camshaft/crankshaft timing correlation), P1327 (knock sensor) - internal engine and timing damage consistent with the recalled defect. On [XXX], Kia of Daphne inspected the vehicle ([XXX]). The technician found low compression and wrote the failure 'does not have to do with recall campaign sc209A' and is 'not covered under Kia warranty or recall,' quoting $5,855.28 for an engine long block. I dispute this: low compression plus lifelong excessive oil consumption is the classic signature of worn piston oil rings - the exact SC209 defect. The one-sentence dismissal does not address the documented symptom history. Kia corporate cases [XXX] (opened 09/30/2026) and [XXX]; rebuttal submitted 10/07/2026 requesting field-engineer review; no response as of 10/15/2026, cases now closed. Safety: total loss of motive power AFTER the remedy was performed. This post-remedy SC209 failure belongs in the federal safety agency's investigation of Kia recall remedy effectiveness. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 6, 2026 · Engine · PA

On August 3, 2025, I was in Erie PA - Presque Isle Park when the check engine light came on. It was a Sunday, so dealership was closed. I was over 3 1/2 hrs from home. Had no choice but to drive home and pray that I made it. On Monday, dealer said OK to drive if light is not flashing. If anything happens, have it towed here (that was comforting). First appt available was 8/26. On 8/26, I went to service area, they said several codes coming up relating to engine issues. They would have to keep the car - not safe to drive - they had no loaners - someone would drive me home. So when I was told OK to drive 3 weeks earlier - that was not true. I live on my own and what would I do if stranded somewhere. Dealer called me later and said that KIA would not honor my 10 yr/100,000 mile powertrain warranty. It was initially in husband's name but he passed away 4/29/2024. PA DMV required me to change the title to my name. The dealership also would not honor their Extended Warranty my husband had purchased for $2000. Meanwhile, the KIA was 5 yrs 8 mos old with only 28,400 miles. The codes that came up in the car were: P030400 Cylinder 4 Misfire P001400 Exhaust Cam Timing Over Advanced P000B00 Cam Position Slow Response Engine Timing Chain Assembly is Stretched - removed and replaced engine timing chain assembly Removed and replaced Exhaust Camshaft Removed and replaced Exhaust CVVT Removed and replaced Intake Camshaft Removed and replaced intake CVVT Removed and replaced the Timing Chain Tensioners I did not receive the KIA back from the dealership until DECEMBER 12, 2025 - YES they had my car from 8/26 to 12/12. Luckily, I had another car I could access since I had no loaner vehicle. After being strung along...making phone calls to the dealership weekly...contacting KIA corporate...and listening to excuse after excuse why they would not honor the powertrain warranty - I HAD IT WITH KIA. I went to a Subaru dealership and signed papers for new car on 12/17/2025.

Filed Dec 25, 2025 · Fuel system · NY

My car has been acting up almost every winter. Bought brand new and within two years would not start. Triple A had to get it started. Next winter it shook and the check engine light came on. There was a misfire. I called Kia of Queensbury and they just told me to keep the gas cap off for a bit and than drive it after putting it back on. I believe the fuel injectors were a problem at that point because at times when starting it would shake and it would lag in power. The check engine light did go off but it kept lagging and I had to put fuel in it more often. They did not diagnose it. The next winter it shook and felt like it was going to shut down. I took it in for diagnosis while it was under warranty. They denied anything was wrong. This winter it did it again. It shook and the check engine light came on. Even though I told Kia service in Queensbury NY that a computer said there was a misfire in cylinder 4 they insisted that if the check engine light was not flashing I could drive it. They wanted me to wait almost two weeks to get it diagnosed. Had I driven it as they stated I could have ruined the engine, it could have caused a fire or for me to have an accident. I called back told them it was shaking and dangerous to drive. They allowed me to take it in earlier. I had it towed in. Now that it is out of warranty and 64000 miles they admitted the fuel injectors had to be replaced and the spark plugs. Because of the issues I had experienced from the beginning, I believe the fuel injectors had been faulty for a long time and could have been a serious risk for myself and other drivers. It was dangerous. The fuel injectors and spark plugs have since been replaced out of pocket. I asked for the fuel injectors and spark plugs that were taken out of my vehicle to be given to me, but the service department did not comply with my request.

Filed Oct 10, 2025 · Engine · NY

Since the first year of ownership, I have noticed that the vehicle burns oil excessively. I reported this issue to the Kia dealership, but I was told that “it is normal to add a quart of oil every other week.” Despite this statement, I believe this is not normal and points to a defective engine design consistent with the piston ring problems known in similar models and engines. In the summer of 2025, the vehicle began having hard-start issues when the engine is hot. Over time, I replaced several components at my own expense through an independent repair shop, including the alternator, starter, PCV valve, MAP sensor, and camshaft sensor. None of these repairs resolved the problem. When I returned to the dealership, they performed a borescope inspection and found scoring and damage on three cylinder walls inside the engine block. Thats whats causing the engine to seize when the engine is hot and make it hard to start and misfire when accelarate.

Filed May 29, 2025 · Engine · VA

Rod bearing pop while driving on highway. Car stalls out. Only warning was oil light and battery light appearing. Rough idle and sluggish...sounds like it's going to blow .

Filed Apr 23, 2025 · Engine · KS

2020 Kia Soul with 55,000 miles on it had the check engine light come on. The car was promptly taken to the dealership where was determined that the combustion chamber had filled with oil which had soaked the spark plugs, causing the pistons to misfire and completely ruin the engine. The car had always been maintained with all maintenance performed at a dealership with receipts for proof but since the car was a second owner and outside the warranty by 7 months, Kia wouldn’t replace engine despite 187k other Kia souls being recalled for similar issues because this vehicle wasn’t included in the recall. There is no reason for a car with only 55k Myles that had been properly maintained according to the owners manual to have an engine seals fail and flood it with oil and total the engine

Filed Nov 2, 2022 · Engine, Steering · TN

At around 91, 697 miles, our 2020 Kia Soul EX began to have issues with the engine stalling out while downshifting in lower speeds, We took our Kia into the local (still an hour away from our home) dealership, for the recall "fix" which involved uploading a firmware update to the ECM for the knock sensor. We also had the dealership look into the issue of stalling out, but they could not replicate the issue and therefore sent us on our way. About two weeks later, the vehicle started making an extreme knocking sound (I am a mechanic and knew what the issue was immediately), and it brought up a check engine light, however there was no oil light or warning of any kind that came on. Upon further inspection, it was discovered that there was no oil in the vehicle. Upon filling the vehicle back up with oil, everything seemed normal, until the weekend of 11 October, when the motor again had an extreme amount of oil consumption, to the point of the same symptoms, along with a loud rattling sound, as if something had broken due to lack of lubrication, despite having an oil change completed less than a month prior, with approximately 1200 miles due to the next oil change. This almost left us stranded approximately 1.5 hours away from home. Again, we filled the engine with oil, and drove with extreme caution as the check engine light never shut off. Again, no oil light or indication the vehicle was experiencing a no-oil condition was present. After getting an appointment and taking the vehicle into the dealership on 20 October 2022, the technician stated that there were multiple CEL codes, including P0017 Crankshaft Position, multiple cylinder misfire codes, and low compression on cylinders 2,3, and 4, with cylinder 2 being the lowest. It was deemed that the top end of the motor looked good, with no obvious signs of neglect in maintenance, or issues that may cause false codes. The vehicle continues to exhibit stalling, and low acceleration, posing a severe safety issue.