P0304 on FORD FUSION
What P0304 Means on Your FORD FUSION
Real FORD FUSION Owner Reports (Source: NHTSA Complaints Database)
"Coolant leak from freeze out plug causing car to overheat first engine light flashed causing a p0304 code then smelled coolant and started overheating"
"My Ford fusion has a coolant leak and ford said I need a repair. Price for repair is $9,584.89. It is a known problem with a TSB (see below) Summary This article supersedes TSB 19-2139 to update the production fix date."
"2015 1.5L Ecoboost misfiring/running rough/coolant level low. While driving highway speeds engine began to lose power and shutter ultimately shutting down causing significant lose of braking and steering."
"Just got this ford vehicle a couple months ago and for some reason my car wouldn't start. i ran a diagnostic and had numerous codes p0300, p0301, p0302, p0303, p0304, p0030, c0014, p0047, p0141, and a few others. i looked for loose wires, checked fuses, plugs etc."
"Coolant intrusion into cylinder 1, low coolant and Engine DTC P0301. Multiple TSB's by Ford recommend engine replacement as a remedy for the Cylinder head - open deck cooling problem. Customer Satisfaction Program 21N12 addresses this problem in similar cars/engines."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0304 on FORD FUSION
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.