P0300 on FORD FOCUS — Random/Multiple Cylinder Misfire Detected

Q: "What does P0300 mean on a FORD FOCUS?"

"P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 2 FORD FOCUS owners have reported this to NHTSA."

Q: "What are the most common causes of P0300 on FORD FOCUS?"

"Based on 2 NHTSA reports, the most commonly cited components are: Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0300 serious on my FORD FOCUS?"

"Of 2 NHTSA reports for this code on FORD FOCUS, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my FORD FOCUS shows P0300?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0300 Means on Your FORD FOCUS

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.

2 FORD FOCUS owners have reported this issue to NHTSA across model years 2017-2018. Most reports come from the 2017, 2018 model years. The most commonly reported component is Engine (100.0% of reports).

Real FORD FOCUS Owner Reports

Source: NHTSA Complaints Database

"After several start/restart cycles the car check engine light comes on and issues the following codes: p0300, p0316. it has a rough idle and the rpms will stay elevated anywhere from 1500-2200 rpm without the throttle being pressed."

— 2017 FORD FOCUS owner · ENGINE · Filed 03/02/2019

"The component that failed is the CANISTER PURGE VALVE. The engine light was on and we took it to a certified auto shop. Report from the auto shop: Diagnosis for check engine lamp on, run tests for codes P0300 random misfire, P0316 misfire on startup, P1450 cannot bleed fuel tank vacuum."

— 2018 FORD FOCUS owner · ENGINE · Filed 05/15/2022

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'17

1

'18

Common Causes on FORD FOCUS

Based on NHTSA complaint component analysis for this vehicle.

ENGINE 100%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0300 mean on a FORD FOCUS? ▾

P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 2 FORD FOCUS owners have reported this to NHTSA.

What are the most common causes of P0300 on FORD FOCUS? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Engine. These percentages are based on the component field in owner complaints.

Is P0300 serious on my FORD FOCUS? ▾

Of 2 NHTSA reports for this code on FORD FOCUS, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my FORD FOCUS shows P0300? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.