2018 Ford Fusion: Misfire on spark plug 2
Common wear/failure (not a recall)
Symptoms
Owners of the 2018 Fusion report: misfire on spark plug 2. CarComplaints.com lists 2 owner complaints, average mileage 44,000 miles.
NHTSA has 273 owner complaints for the 2018 Fusion in this area. Examples:
- NHTSA complaint ODI #11768910 (filed 10/05/2026): “My 2018 ford fusion suffered a sudden and complete engine failure caused by internal coolant intrusion — coolant leaking into the cylinders and destroying the engine. pep boys diagnosed that the failure developed internally over time and could not have been av…”
- NHTSA complaint ODI #11768079 (filed 09/30/2026): “Capital ford of wilmington diagnosed my vehicle with coolant intrusion into cylinder 2, accompanied by diagnostic trouble codes p0302 and p0316, after check engine light came on. i have been advised that the vehicle requires a complete engine replacement, with…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: had engine replaced with a convertor and throttle body (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $7,900 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .