2016 Kia Soul: misfire or rough idle

Filed Nov 4, 2026 · Engine · AZ

My vehicle was towed to the dealer to address a recall. Campaign 19V120/SC176. I advised them I had codes #300, 303 &304. I requested a compression test & documentation of the findings. They instead cleared the codes, addressed the ksds software update & declared the car "fixed". Upon leaving, the engine lost power (in traffic) & the check engine light returned. I limped the car back & again requested a compression test which they did not perform even after pulling codes of a "misfire". They pulled the plugs & advised replacement as well as replacement of the coils for $1,200. I believe I'm entitled to knowing the health of the engine by means of a compression test & possible short block replacement if it's deemed necessary (per recall SC176)

Filed Sep 24, 2026 · Engine · CA

The engine long-block assembly suffered a catastrophic, terminal internal collapse and sudden stall due to abrasive substrate particle ingestion from a previously failed, melted manifold catalytic converter under Safety Recall SC176 (the federal safety agency Campaign 19V120000). The vehicle has been extracted to preserve evidence and is available for immediate physical inspection. The vehicle suffered a complete, sudden loss of motive power and stalled while traveling at high speeds on a busy public highway. It went into an un-accelerated limp mode, creating an immediate hazard of a high-speed rear-end collision on the highway shoulder. Authorized franchise facility Garden Grove Kia officially confirmed the terminal block failure under Repair Order #6238999. A diagnostic scan confirmed multi-cylinder misfires (P0300–P0304). A physical compression test confirmed a terminal drop to 59.6 psi in Cylinder 2, and an internal camera borescope confirmed a catastrophic internal Cylinder 2 wall crash damage not sealing alongside a fractured spark plug tip inside Cylinder 4. The dealership officially recommended a total engine replacement. The vehicle was inspected by a certified franchise dealer technician representing the manufacturer. A formal enforcement case has been opened regarding this vehicle asset and documentation file with the California Bureau of Automotive Repair (BAR) under Reference Case #669B-C5PDRP

Filed Aug 12, 2026 · Engine · 59,242 miles · CA · 1 injury

The contact's grandmother owns a 2016 Kia Soul. The contact stated that while his grandmother was driving at an undisclosed speed, the engine overheated. No warning lights were illuminated. The contact stated that due to the failure and the outside temperatures, his grandmother was stuck inside the inoperable vehicle. The contact's grandmother sustained a heat stroke while waiting for assistance. The contact's grandmother was transported to the hospital. The vehicle was taken to Firestone, where DTC: P0420 and P0302 were retrieved. The contact was informed that the codes indicated an engine misfire. While driving to Firestone, the failure reoccurred, and the vehicle stalled. The contact was advised to take the vehicle to the dealer for assistance. The vehicle was towed to the dealer; however, the failure was not duplicated. In addition, the vehicle was repaired under the federal safety agency Campaign Number: 19V120000 (Engine, Engine and Engine Cooling); in 2021. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 59,242.

Filed Oct 21, 2024 · Engine · GA

My kia has always used a lot of oil to the point I need to top it off regularly despite getting recommended oil changes and doing recommended maintenance. Recently My engine started misfiring so I replaced all spark plugs and ignition coils, but was still having issues. Found out today that catalytic converter is main issue and needs to be replaced. Dealer is requiring I bring in to determine if a warranty will cover. Never had a check engine light but very slow acceleration that created several dangerous situations for me on the road. My professional mechanic repaired other issues/diagnosed this problem.

Filed Aug 16, 2024 · Acceleration, Electrical · IA

I have a 2016 Kia soul. Second owner. 144,000+ miles. For nearly a year my car has been consuming oil at an alarming rate. But I have no oil leaks anywhere. My dealership did an oil consumption test about 5-6 months ago and within 1000 miles, I was already below the half way line on my dipstick but the dealership told me I was still in range and sent me on my way. Fast forward a few months and I brought up my concerns again with my dealership and the oil consumption. I was told to drive it until the engine seizes and they would tow me. At which point, I told them that sounded dangerous but apparently Kia will not do anything for my vehicle if all it is doing is consuming oil. July 26, I’m out of town about two hours + from home and out of nowhere my car starts idling high. Failing to shift gears. If I go to speed up past 60mph, the car forcibly bogs down to 45mph and struggles to get back up to speed. The vehicle was shaking, knocking, and struggling with performance. I drove the car to a small town and checked my oil. Bone dry. So I top it off with a couple quarts. I drove the car to a non Kia dealership where a mechanic told me my car was misfiring. He popped the hood and for the first time, my engine was knocking back and forth. It’s never done that. He said that he felt confident there was rod damage and drove it around the block. When he returned he said it was not safe to drive and I had it towed to the closest dealership over an hour away. The dealership felt extremely confident that my car was going to qualify for the motor swap warranty that Kia offers up to 150,000 miles or 15 years. Keep in mind, my car NEVER once threw a check engine light during any of these occurrences, nor did a low oil light ever come on in the 4 years I owned the vehicle. My vehicle has been down 3 weeks and still has not been fixed from Kia.

Filed Mar 14, 2024 · Engine, Fuel system · OR

I had recently acquired my 2016 Kia soul from a used dealership, and as I had gotten it, inspected by a mechanic, the back rear brake was locked. The Penrod was missing on one of them, and my driver side door lock was broken and I thought that was simple issues that could be repaired. You know that’s a used car whatever as I started driving it not even a month later I start feeling heavy acceleration when barely hitting the gas and trying to shift because it is a manual and loss of power on first and second gear, like it was going to stall out without even rubbing the RPMs to get it to move. I did some research found out that there was multiple recalls on the catalytic converter and it’s causing a fire the ECUs and also the antitheft system so I am a single mom. I work constantly and my only vehicle with 4kids, so a full month mark my Oil light all of a sudden started coming on but flickering I pulled over there’s no smell of burning oil no leaks no high temp I checked my oil stick. It was fine a thick drip on it. I Thought everything was fine, but the light still kept coming on and flickering when I would accelerate it would go off when I would decelerator push clutch in it would stay. I called kia dealer had it taken, did the recall orders on it but they told me they wouldnt do an oil check or do a code diagnostics for it unless I paid over $200 for just that diagnostics after they did all the recall orders I picked up the car over a day later. started having misfires the car was driving worse then when I took it to the dealership, i would drive up hill I’d lose power. Shifting gears from 1-4 it sounds like the whole engine was shaking like it was gonna fall out of the car I called the dealership and told them what was goin on. They were really rude to me and told me an hour later it was throwing codes of misfires an again have to pay for it, they stated the oil an misfires werent their fault doin the recalls. ECU an ANTITHEFT, I am worried for my kids safety!!!!!

Filed Dec 19, 2023 · Engine · NY

Experiencing issues with the catalyst or catalyst converters. Misfire and codes as well as check engine light present

Filed Dec 18, 2023 · Engine · FL

There was an engine light on my Kia and put on code reader and had several misfires and catalytic converter and sensor emissions control. Called Kia dealership and was told not covered under vin number for safety recall. But doing same thing as ones recalled. Will drive but than stalls and almost causing people behind me to rear end me on very busy road ways. Manufacture has not inspected it dealership refused it. Could end up killing someone and I can’t afford to fix only 122 ,000miles and I’m on fixed income started 2 weeks with issues

Filed Sep 19, 2023 · Engine · OK

I have had a catalytic convert failure 3 times in 4 years. The first was repaired with the recall on may of 2019. It was replaced at a Kia dealership, with Kia parts. I had my vehicle at the dealership a month prior due to it not running correctly. The second replacement of the catalytic converter was on November of 2020. I was driving on the interstate very early in the morning when my vehicle slowed to 15 mph, no warning lights came on. I had several other vehicles come very close to hitting me. I was able to exit the interstate which took a lengthy amount of time due to my vehicle slowly losing speed. When I was able to pull over to a safe spot my vehicle quit all together. I had it towed to the same Kia dealership. They looked it over and found the converter failed again. It was replaced with Kia parts. I have taken my vehicle in once again due to it stopped running while I was at work. The same dealership has found that for the 3rd time my catalytic converter has failed. I have also replaced all spark plugs and coil packs on this vehicle twice in less than a year due to it misfiring. My engine is also somehow burning oil exponentially. This leads me to believe there is something wrong with my vehicles engine. I also believe something is wrong with Kia parts that they only last a little over a year.

Filed Sep 7, 2023 · Engine · TX

I took my 2016 Kia Soul to Fredy Kia back in June because it had been misfiring and dying while driving. They said the catalytic converter needed to be replaced. I had taken my car in for the ECU update because of the possible rod bearing piston engine failure due to catalytic converter failure. They would not do a good faith coverage for the repair even though it was just over warranty and they have a massive settlement going for the rod bearing damage on engines and I am seeing massive talk online with other Kia Soul owners having the same issues with the catalytic converter. These cars are catching fire eventually and dying on the freeway. This is a massive safety issue and I cannot believe they aren't including the catalytic converter under it. Furthermore, the service manager at Fredy Kia liedto me and said I had to contact Kia Warranty about a good faith coverage for the repair. Today, I finally learned from Kia Warranty that it is actually the Dealers who makes that decision. I would have taken it to a different dealer with more ethics.

Filed Aug 2, 2022 · Engine · 87,145 miles · CA

The contact owns a 2016 Kia Soul. The contact stated while driving approximately 35 MPH, the front end started shaking. The contact depressed the accelerator pedal and there was a rough idling sound coming from the engine. The contact stated that the check engine warning light illuminated and flashed on and off. The contact drove the vehicle to his residence, parked the vehicle, and inspected under the hood. The contact became aware that the radiator hoses were swollen, and the coolant reservoir cap was missing. The contact had not taken the vehicle to a dealer to be diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 87,145.

Filed May 23, 2022 · Engine · WI

I received a notice from Kia that my car was part of a recall affecting the engine. I brought my car into the nearest Kia dealership to me and they confirmed that my car had a recall in which they were to run a program and check the catalytic converter and engine. I confirmed before and after this visit that they checked everything and was told that yes they checked the catalytic converter and everything was fine and they updated the engine program that was called for by the recall. I have brought my car in atleast 3 times and never having any issue previously was insured that my car would be covered under the recall but that we had to essentially wait for the engine to fail before that could be done. My car has lost power suddenly on the highway twice since this program has been run. Every visit i was told that my car was safe to drive. The most recent visit - which happened less than 30 days from the previous one where I was told my vehicle was safe to drive - has resulted in me being told that my catalytic converter has suddenly become clogged and that “my vehicle is not effected by this recall”. The visit before no such issue was mentioned in fact I was only informed my engine had “some codes and a few misfires” - again this was less than 30 days before my catalytic converter suddenly clogged. It is important to mention that this all happened with 6 months from the time the program was ran until today. I have the receipts of all of my visits to Kia. This most recent visit on May 19, 2022 in which I was told about the catalytic converter was the result of the second loss of power on the highway dropping from 70mph to 40mph suddenly and then continuing to decrease as I tried to navigate to the side of the road while traffic continued at normal speed around me; putting me, my child and others on the road at great risk of accident and injury. This is unacceptable.