2019 Ford Fusion: misfire or rough idle

Filed Sep 9, 2026 · Engine · MO

It all started with a cylinder 3 misfire warning code, spark plugs replaced, coils replaced. Then a coolant leak. No obvious signs of a leak no cracked tubing no puddles. Just coolant leaking. Was informed I have a coolant leak intrusion and need a new engine block. I still owe $14k on this vehicle and am past my warranty. This repair is going to cost $12k. Researched and found out this is a problem for these vehicles that ford had an engineering problem with these engines.

Filed Jul 9, 2026 · Engine · TX

The vehicle experienced engine failure due to coolant intrusion into the cylinders on the engine. I've experienced engine misfires, rough running, check engine light, and I'm worried I'm going to see an eventual engine failure requiring engine replacement. The BIGGEST issue is I've had total loss of power in my engine while on a public road more than once, before the check engine light ever came on. Its terrifying. It is dangerous. And Ford is aware it is dangerous. Ford issued Customer Satisfaction Program 21N12 for certain affected vehicles due to this exact issue, but my vehicle is past the warranty so it's SOL. The failure appears to be caused by a defect in the engine design allowing coolant to enter the combustion chamber. This is clearly a widespread defect as Ford had to create their limited warranty for it. This is something that needs to be recalled for all affected vehicles experiencing coolant intrusion and engine failure because it is not safe to be on the road.

Filed Jul 1, 2026 · Engine · ID

My 2019 Ford Fusion 2.0L EcoBoost (89,000 miles) experienced a sudden, severe engine malfunction due to a known manufacturing defect. The vehicle exhibited severe engine shuddering and a harsh cold-start misfire upon ignition. A diagnostic scan revealed trouble codes P0316 (Misfire on Startup), P0302 (Cylinder 2 Misfire), and P0304 (Cylinder 4 Misfire). A mechanic verified that these codes are the result of internal coolant intrusion into the engine cylinders, exactly as documented in Ford Technical Service Bulletin TSB 19-2346. The structural design flaw in the engine block allows engine coolant to breach the cylinder head gasket area and pool inside the combustion chambers. This presents a critical safety hazard: the vehicle is at risk of sudden engine stalling while driving on public roads, a complete loss of motive power in traffic, and potential engine hydro-lock, which can cause catastrophic mechanical failure or an engine compartment fire. Ford is refusing to address this safety defect outside of warranty, leaving a hazardous vehicle on the road.

Filed Jun 11, 2026 · Engine · FL

Misfire due to cracked cylinder wall letting coolant leak into the cylinder in the 2.0L turbo

Filed May 19, 2026 · Engine · TX

The vehicle experienced engine failure due to coolant intrusion into the cylinders on a 1.5L EcoBoost engine. Symptoms included coolant loss, engine misfires, rough running, check engine light, and eventual engine failure requiring engine replacement. The problem has been confirmed by Ford and is consistent with the known coolant intrusion defect affecting many Ford 1.5L EcoBoost engines. Ford issued Customer Satisfaction Program 21N12 for certain affected vehicles due to this exact issue. The vehicle has approximately 76,000 miles and is under the mileage limit referenced in Ford’s program, but Ford denied full coverage and only offered partial financial assistance toward the repair. This issue creates a serious safety concern because the engine can lose power, misfire, overheat, or fail unexpectedly while driving. The failure appears to be caused by a defect in the engine design allowing coolant to enter the combustion chamber. I believe this is a widespread defect and should be covered for all affected vehicles experiencing coolant intrusion and engine failure.

Filed Apr 17, 2026 · Engine · AZ

Coolant intrusion into cylinder #2 in my 2.0L Ecoboost engine. This gives a rough engine start and a misfire code for cylinder #2 on cold starts. After warmup, the engine code is not active and misfire goes away when the coolant is burnt and sent through the exhaust. This also caused the car to overheat as the coolant was dropping to a low level. There was no indication of the low coolant level until the overheating.

Filed Mar 3, 2026 · Engine · TX

Coolant leaking into cylinders on my 2019 Ford Fusion 1.5L EcoBoost—white smoke, rough idle, and wont start now. Ford's 21N12 program expired before I could get it fixed. Tons of owners report the same; it's a safety hazard.

Filed Feb 6, 2026 · Engine, Transmission · TX

2019 Ford Fusion equipped with the 1.5L EcoBoost engine has experienced overheating and misfire issues, linked coolant intrusion into the engine cylinders, which can lead to engine overheating and potential fire hazards. This is a KNOWN issue by Ford but they have not issued a recall, or even let me know in the 6 years that I have had the vehicle.

Filed Dec 18, 2025 · Engine · MI

Vehicle has a known Ford 2.0L EcoBoost coolant intrusion / head gasket defect per multiple complaints on different forums on recently googled searches. At approximately 126,000 miles, vehicle began losing coolant with no visible external leaks, producing white smoke on startup, rough idle/misfires, and check engine light. Vehicle also began overheating intermittently. Heating system stopped working, indicating coolant flow failure. Symptoms are consistent with internal coolant intrusion into cylinders due to head gasket failure, a widely reported defect in Ford EcoBoost engines. Issue presents a safety risk due to potential engine failure while driving, loss of power, and overheating. Vehicle requires major engine repair or replacement. This failure occurred despite regular maintenance and appears to be a premature engine defect, not wear and tear. I was recently at the dealership on December 8th with no other issues detected after they replaced a part on my car that failed that I had to pay for ( a P175B-00 ). This had nothing to do with what is going on currently, they ran tests at this dealership and did not detect anything as of December 8th. This was at a ford dealership. Tests were ran and inspected by manufacturer. Fast forward to a week ago I started having the above symptoms and this was diagnosed by family-friend auto mechanic. I have had multiple issues with this car. The transmission blew at 50 thousand miles, the sun roof leaked ( the seal for the sunroof was defective) into my prnd control shifter causing thousands of dollars in damage, a P175B-00, causing my car to not be able to park, causing chaos for weeks. I have only owned this car since December 2020. I still owe 7 thousand on this vehicle and I am at a complete loss. I really just want ford to take accountability for this make and model as it never fits the guidelines for recalls on anything. I want justice for myself and others with these multiple issues coming from ford cars.

Filed Oct 20, 2025 · Engine · MN

10/2024 We noticed coolant was low. filled and kept watch. around 95,000 miles 6/2025 Just hit over 100,000 miles. engine misfire cylinder 3. brought it in, coolant was low, filled and replaced spark plug. 8/2025 engine misfire cylinder 3. brought it back in completed cleaning kit 8/2025 engine misfire cylinder 3. brought back in (2 weeks later). checked further and recommended a valve replace, and we needed to take it to a Ford dealership to replace 10/2025 brought into Ford dealership, coolant leaking into engine, need new engine. Ford will not cover. This is a safety issues as engine could cause fire, if coolant runs to low.

Filed Oct 1, 2025 · Engine, Transmission · CA

Check engine light was on and off intermittently for a few months starting in march of 2025. No immediate problem then, vehicle had 89 90k miles. In August. The vehicles coolant was leaking into the engine . Rendering a misfire in the cylinder and blowing the head gasket after mechanical diagnosis but not checked immediately due to symptoms not occurring till after a few weeks in August.Car not once over heated but then would not start. The car would then not go past a 40 mph without the transmission pushing very hard. After 3rd party mechanic diagnosis, I looked into potential recall on Fords website and in fact there was one but I was never notified of. So I contacted ford . The said yes, your car is under warranty, however after taking it in, they refused to repair the damages since the problem occurred 10k miles passed the mileage listed on the warranty for the repair. The car is unsafe and not drivable and the issue, which they knew would occur, did not happen till 10k miles passed Fords set parameters in which even if I took it in at that timeframe listed, the problem was not noticeable to be fixed. Very unsafe and unfair to the consumer.

Filed Sep 6, 2025 · Engine · FL

Coolant is intruding into the engine, with no sign of a leak. There was a TSB 22-2229 issued that my car falls under, but ford claims they are not at fault to pay for it. This was a manufacturing error, and was at no fault of my own. My car has less than 60k miles on it. A check engine light came on for cylinder 3 misfire. There was no warning signs that an engine failure was occurring. The car is not driveable as it could overheat at any moment.