2015 Ford Fusion: engine overheating

Filed Sep 8, 2026 · Brakes, Engine · FL · crash

Year/Make/Model: 2015 Ford Fusion Engine Type: 1.5L EcoBoost 4-Cylinder Description of Safety Flaw and Incident: My vehicle is experiencing severe overheating and internal engine fluid loss due to the widely documented Ford EcoBoost coolant intrusion defect. The vehicle routinely runs hot, losing coolant rapidly with no external signs of a visible hose or radiator leak as well as failure of the brake lighting stop bumper and purge valve connecting to the gasline after fueling. This issue causes the vehicle to rapidly overheat while in motion, forcing sudden loss of engine power (limp mode) during highway driving. Car not properly cranking after fueling and brake light continuously being on even when brakes not being pressed. This unexpected drop in speed creates an immediate crash hazard for myself and surrounding traffic. Coolant entering the combustion chamber also fouls the spark plugs, causing severe engine stalling, rough idling, and misfires. I've spent several dollars fixing these malfunctions that have continuously persist. Ford Motor Company has historically been aware of this structural defect involving coolant leaking across the cylinder bore walls, yet failed to issue a comprehensive safety recall for 2015 models. I am filing this complaint to urge the federal safety agency to open a formal defect investigation and mandate a safety recall, as this component failure leaves drivers stranded in hazardous traffic situations.

Filed Jun 6, 2026 · Engine · FL

I bought the 2015 ford fusion for my son as a graduation present as he headed off to college on his own. The car started misfiring upon cold start for about 5-10 seconds. Eventually the car started misfiring while driving. He frequently had to pull over on the side of the road while driving to make it to his destination. I had him take the car to a ford dealership to be inspected. To my surprise, Ford Parks of Wesley Chapel told me that the 2015 Ford Fusion 1.5L ecoboost has a known issue with coolant leaking into the engine causing misfiring and eventually engine failure. They offered no assistance in fixing the problem. They told me the cost to replace the engine was over 13,000.00.

Filed May 27, 2026 · Engine · 91,000 miles · FL

The contact owns a 2015 Ford Fusion. The contact stated that the vehicle was experiencing excessive coolant consumption, causing the low coolant pressure warning light to illuminate prematurely. The vehicle was taken to an independent mechanic, where it was diagnosed with coolant intrusion in the combustion. The contact was informed that the head gasket or the engine needed to be replaced immediately to prevent further issues. Additionally, the contact was informed that the failure was due to a faulty engine design. The vehicle was not yet repaired. The manufacturer was notified of the failure and informed the contact that although the model year was affected, the vehicle was not covered. The failure mileage was approximately 91,000.

Filed May 5, 2026 · Engine, Fuel system · NY

I own a 2015 Ford Fusion SE. I bought it used when it only had 47,000 miles on it. Over the course of time since buying it in DEC 2022 until now, it has had low coolant that I have had to address but no visible leaks. Current mileage now is 87,100 and just recently the coolant was low again and the check engine light came on for DTC P0301 -Cylinder 1 misfiring. It has had rough start ups, rough idle, decreased acceleration, and poor fuel efficiency. I have found the problem to be Coolant Intrusion – Engine Defect Concern “Coolant intrusion” is a known engine design defect in which coolant leaks into the cylinders, leading to internal damage, misfires, and eventual engine failure. After researching it I found that many other people have had the very same issue with no help from Ford. This should be a recall as this is an internal issue with the short block and something that should have been disclosed before purchasing this model/engine. The only repair that will fix the core of the issue is replacing the entire short block which costs thousands of dollars, way more than the cost of the entire vehicle at this point. Without fixing the issue, the engine will fail. Again, this should be something Ford should pay to repair, not any customer who came into this blind.

Filed Jan 22, 2026 · Engine · OK

My 2015 Ford fusion 1.5 L engine has had problems since 2022. I have been adding antifreeze, changed spark plugs many times, flushed my antifreeze and the vehicle overheats and has had to be towed twice changed out thermostat, spark plugs, coil pack, two times for misfiring coolant housing with no success. Called in a complaint to Ford Motor Co. and they are unwilling to help. They said they put out a bulletin however this does not fix the problem of needing a new engine. I am stuck making payments on a car I cannot drive. My mechanic says it needs a new engine. Never realizing there was a bulletin or a coolant intrusion problem with this engine.

Filed Oct 31, 2025 · Engine · VA

Car began leaking coolant, overheating, smoking (white smoke) and misfiring on cylinder #3. Based on my research, this is an issue Ford knows about due to it being a defect in the design, yet I'm being told I have to pay to replace the engine. We replaced the spark plugs, coils, and nothing helped. We took it to a mechanic and were told we need an entire engine replacement and it won't be covered by Ford.

Filed Jul 29, 2025 · Engine · 175,000 miles · TN

The contact owns a 2015 Ford Fusion. The contact stated while driving at various speeds, the engine overheating warning light illuminated. The contact stopped the vehicle, and the vehicle was towed to an independent mechanic. The vehicle was diagnosed, and it was determined that an engine sensor had failed and needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The contact stated that the failure reoccurred 2 more times. The contact stated that during recent failure, there was a misfire coming from the engine and the engine was idling rough. The vehicle was driven to the same mechanic, who diagnosed the vehicle and determined that there was coolant intrusion into the engine block, and the engine needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 175,000.

Filed Jul 10, 2025 · Engine · TX

Coolant leaking into cylinder 2, misfire (P0302), overheating, and white smoke from exhaust. Mechanic diagnosed potential head gasket or coolant intrusion issue. Vehicle is out of warranty. This seems related to known issues on EcoBoost engines, including TSB 19-2208 for later models, but no recall exists for the 2015 model. Major safety concern and potential engine failure

Filed Jun 30, 2025 · Engine · 144,000 miles · TN

The contact owns a 2015 Ford Fusion. The contact stated while driving 40 MPH, the temperature gauge indicated that the engine was overheating, and the vehicle started losing motive power. The contact turned off the vehicle for three minutes and then immediately drove the vehicle to the local mechanic. The vehicle was taken to two independent mechanics. The first independent mechanic diagnosed the vehicle and determined that the head gasket had failed and needed to be replaced; however, the mechanic was unable to perform the repair. The vehicle was then towed to the second independent mechanic where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that there were no recalls on the VIN associated with the failure. The contact was referred to the federal safety agency Hotline for assistance. The failure mileage was 144,000.

Filed May 29, 2025 · Engine · CO

After check engine light and the coolant fluid low light came on, I took it to a ford dealership and was told that they found there was a coolant leak which caused the engine to fail and that the short engine block needed to be replaced and it would be 9000 dollars to repair. so we are now faced with paying for a repair that is double what the car is worth or get a new car. there was never a recall for the coolant leak even though Ford knows its a known issue.

Filed May 7, 2025 · Engine · 113,000 miles · IL

The contact owns a 2015 Ford Fusion. The contact stated while driving approximately 40 MPH, the message that the engine was overheating was displayed. The contact stated that the temperature gauge indicated that the engine was hot(H). The contact drove the vehicle to an independent mechanic who diagnosed the vehicle and determined that there was coolant into the cylinder. The contact was advised that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure and referred the contact to the Hotline to report the failure. The failure mileage was approximately 113,000.

Filed Jan 29, 2025 · Engine · 70,000 miles · NC

The contact owns a 2015 Ford Fusion. The contact stated while driving at an undisclosed speed, the engine overheated. There were no warning lights illuminated. The contact pulled over to the side of the road and noticed there was white smoke coming from under the hood. The vehicle was towed to the residence and then was towed to an independent mechanic to be diagnosed. The contact was informed that coolant intrusion into the engine had damaged the engine and that the engine needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was informed of the failure and confirmed that the VIN was not under recall for the failure. The contact was advised to contact the federal safety agency Hotline to report the failure. The vehicle was towed to the residence and had not been driven since. The failure mileage was approximately 70,000.