Lincoln MKC check engine light comes on

Filed Oct 29, 2026 · Engine · 70,000 miles · FL

The contact owns a 2018 Lincoln MKC. The contact called on behalf of his wife who stated while driving at an undisclosed speed, the vehicle stalled. The vehicle was towed to an independent mechanic where it was diagnosed that there was an eco boost coolant intrusion and that the spark plugs and coils needed to be replaced. The vehicle was repaired however, the failure persisted, and the check engine warning light was illuminated. The vehicle was taken back to the independent mechanic where it was diagnosed that there was a blown head gasket that needed to be replaced. The failure mileage was approximately 70,000.

Filed Oct 22, 2026 · Engine · NJ

After my check engine light came on the dealership performed a cooling system pressure test and borescope inspection which confirmed a cylinder 2 misfire caused by structural coolant intrusion into the engine block. The dealership repair estimate is over $14,000. As an elderly and handicapped individual facing unstable housing, this catastrophic vehicle failure leaves me stranded, and the out-of-pocket cost is a severe and impossible financial hardship. •Known Inherent Defect: I learned that this exact failure—coolant leaking into cylinder 2 due to a recognized structural design flaw in the EcoBoost block—is a widely documented manufacturing issue. It is currently the subject of certified national class-action litigation (Miller, et al. v. Ford Motor Company), specifically naming the 2019 Lincoln MKC. •Prior Diagnostic History: The check engine light first illuminated at 100,700 miles. The vehicle has been treated with care. This is a catastrophic structural crack, not a wear-and-tear issue. •Extended Warranty Context: I previously invested in an Extended Service Warranty to protect against major failures. While Lincoln Client Services has initially denied coverage on a technical milestone, the underlying manufacturing defect was already present and actively failing before this point. This is a known, widespread engineering issue rather than a consumer maintenance failure. Given my current physical and housing hardships, I urgently require corporate assistance to resolve this so I can regain access to necessary medical transportation. I learned that this defect can lead to: •Sudden Engine Overheating •Engine Misfires and Stalling •Fire and Electrical Hazards •Catastrophic Engine Failure I am afraid to drive this vehicle but I have medical needs that I have to address. I submit this complaint to encourage investigation for a possible safety-related defect which should lead to a safety recall. I found out too late. I hope I can help others be informed and safe

Filed Oct 8, 2026 · Engine · 45,000 miles · NY

The contact owns a 2017 Lincoln MKC. The contact stated that while his wife was driving 65 MPH, the check engine warning light was illuminated. An independent mechanic was contacted. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that there was coolant inside cylinders #2 and #3. The contact was informed that the engine needed to be replaced. The engine was replaced, and the vehicle was repaired. The failure mileage was 45,000.

Filed Oct 7, 2026 · Engine, Transmission · FL

Rough idle at start up persisted as I got onto the road and caused near complete loss of drivability as "check engine" light appeared for the first time. Had towed to mechanic who replaced coils and plugs. One month later, check engine light appeared again. Brought back to mechanic who looked it over and said it was fine. Two weeks later, third apperance of check engine light. This time, I took to Lincoln dealership who ran appropriate diagnostics and confirmed one week later this is the coolant intrusion defect that will require a long-block engine replacement for $12,500. Car has 55,000 miles.

Filed Sep 27, 2026 · Engine, Transmission · CA

I am filing an urgent safety complaint regarding a severe Ford/Lincoln EcoBoost engine defect, fraudulent recall reporting, and the illegal refusal of repair on my vehicle, which has only around 20,000 miles. Since this vehicle is under an active safety recall, the manufacturer and dealership have a strict legal obligation to perform the recall repair at no cost to the consumer.My vehicle recently experienced a major engine failure with the Check Engine Light illuminated The authorized dealership diagnosed the issue as an inherent EcoBoost engine defect, specifically confirming a Cylinder #1 Misfire caused by Coolant Intrusion into the engine cylinders. They stated that the engine is severely damaged and provided a repair estimate of $12,000 for a complete Long Block Engine Replacement.However, they are completely refusing to cover this repair, telling me that they cannot help me and that I must pay out of pocket to fix it myself. To evade their legal safety obligations, the manufacturer sent an official letter falsely claiming that the recall service was already successfully completed at Norm Reeves Lincoln on April 24, 2024. This is a complete lie. I have NEVER received, authorized, or brought my vehicle in for this recall service.They have fraudulently marked this safety recall as completed in their system to strip away my consumer rights and leave me with a dangerous vehicle and a $12,000 bill. Operating a vehicle with coolant intrusion poses an immediate risk of sudden engine stalling, catastrophic failure, or fire on the highway. I formally request the federal safety agency to investigate this fraudulent recall reporting and unlawful refusal of repair, and compel Ford/Lincoln to perform the actual safety recall and long block engine replacement immediately at no cost as required by federal law.

Filed Sep 17, 2026 · Engine · 101,989 miles · OH

The contact's wife owns a 2017 Lincoln MKC. The contact stated that while driving at various speeds, the engine was running rough. The check engine warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed and determined that the #3 cylinder and spark plug had seized and there was water intrusion into the engine. Upon further investigation, the contact associated the failure with the federal safety agency Action Number: DP26008. The contact stated that the engine was previously replaced by an independent mechanic with parts from the local authorized dealer. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 101,989.

Filed Sep 16, 2026 · Engine · GA

Sept 2026. Coolant intrusion. Causes engine light to illuminate, engine to overheat, rendering vehicle unable/unsafe to drive, potential fire risk. The failure was diagnosed by Lincoln dealer as a known defect via technical service bulletin. My research revealed this defect is found in numerous Ford vehicles.

Filed Sep 14, 2026 · Engine · 55,304 miles · NJ

The contact owns a 2019 Lincoln MKC. The contact stated that upon starting the vehicle, the check engine warning light was illuminated. The vehicle was taken to an independent mechanic and was diagnosed with coolant intrusion in cylinder #3 and head gasket failure. The contact was informed that the engine and turbo charger needed to be replaced. The manufacturer, Lincoln, was notified of the failure, but no assistance was provided. The failure mileage was 55,304.

Filed Sep 11, 2026 · Engine · NC

I own a 2018 Lincoln MKC equipped with the 2.0L EcoBoost engine. The vehicle currently has approximately 72,326 miles. The check-engine light initially illuminated and an OBD scan produced code P0303, indicating a misfire in Cylinder 3. No other diagnostic codes were reported. Following mechanical evaluation, all four spark plugs and ignition coils were replaced. Approximately 145 miles later, the check-engine light returned with the same P0303 code. The code was cleared to confirm recurrence, and approximately 111 miles later the check-engine light illuminated again. I subsequently took the vehicle to a Ford/Lincoln dealership for further diagnosis. The dealership determined that coolant is leaking into Cylinder 3 and advised that the required repair is replacement of the engine/long-block assembly, at an estimated cost of approximately $8,900. I have since learned that Ford issued Technical Service Bulletin 19-2346 addressing certain 2017–2019 Lincoln MKC vehicles equipped with the 2.0L EcoBoost engine that may exhibit coolant intrusion into the cylinders, an illuminated malfunction indicator lamp, and misfire diagnostic codes including P0303. The prescribed repair under the bulletin may require replacement of the long-block engine assembly. A search of the federal safety agency's recall database using my VIN does not presently identify my vehicle as subject to a safety recall for this coolant-intrusion condition. I am submitting this complaint so that the federal safety agency has a record of another 2018 Lincoln MKC 2.0L EcoBoost experiencing a dealer-confirmed coolant-intrusion failure consistent with Ford's published technical guidance. I am particularly concerned about whether this failure mode has safety implications and whether the population of potentially affected vehicles has been adequately identified. The vehicle had not exhibited significant drivability problems, rough cold starts, or other obvious warning symptoms before the recurring P0303 check-engine indication.

Filed Sep 10, 2026 · Engine · 76,131 miles · WI

The contact owns a 2019 Lincoln MKC. The contact stated that while starting the vehicle, the vehicle unexpectedly jolted. The contact stated that while driving 30 MPH, the check engine warning light illuminated. The vehicle was taken to the dealer to be diagnosed, and it was determined that coolant was leaking into the engine block, causing engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure by telephone. The failure mileage was approximately 76,131.