P0300 on Ford Fusion
Random/Multiple Cylinder Misfire Detected
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Ford Fusion context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P0300.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What P0300 Means on Your Ford Fusion
P0300 is a diagnostic trouble code indicating: Random/Multiple Cylinder Misfire Detected. This code relates to the ignition system system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
Real Ford Fusion Owner Reports
Source: NHTSA Complaints Database
"Codes P0300 P0301 P0316 - My son was driving and approached a red light - his car began to idle rough and check engine light came on. Instructed him to park the car and we towed to a local mechanic. Cylinder 1 was misfiring and also had a mix of oil, fuel and possibly coolant in Cylinder 1."
"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."
"We have now experienced the identical defect in the engine in this car two times."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on Ford Fusion
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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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.