P0300 on HYUNDAI ELANTRA — Random/Multiple Cylinder Misfire Detected

Q: "What does P0300 mean on a HYUNDAI ELANTRA?"

"P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 3 HYUNDAI ELANTRA owners have reported this to NHTSA."

Q: "What are the most common causes of P0300 on HYUNDAI ELANTRA?"

"Based on 3 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 HYUNDAI ELANTRA?"

"Of 3 NHTSA reports for this code on HYUNDAI ELANTRA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my HYUNDAI ELANTRA 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 HYUNDAI ELANTRA

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.

3 HYUNDAI ELANTRA owners have reported this issue to NHTSA across model years 2015-2018. Most reports come from the 2015, 2017 model years. The most commonly reported component is Engine (100.0% of reports).

Real HYUNDAI ELANTRA Owner Reports

Source: NHTSA Complaints Database

"Engine failure consistent with known Hyundai engine defect."

— 2015 HYUNDAI ELANTRA owner · ENGINE · Filed 01/22/2026

"The Issue started back in December of 2023.The Engine failed while driving to Lake Worth, TX. Vehicle Information: Model is a 2017 Hyundai Elantra Limited 2.0 Engine, US Built. Mileage during the1st incident was at 100,125 miles and the VIN Number is [XXX] ."

— 2017 HYUNDAI ELANTRA owner · ENGINE · Filed 12/04/2023

"I am filing this Vehicle Owner's Questionnaire (VOQ) regarding critical safety defects in my 2018 Hyundai Elantra related to: - Recurrent ignition coil pack failures (3 replacements since 10/2018) - Engine stalling at low speeds (6 incidents since 10/2018) - Dealer refusal to apply TSB 20-01-008H EC"

— 2018 HYUNDAI ELANTRA owner · ENGINE · Filed 06/08/2025

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

📊 Complaint Trend by Model Year

1

'15

1

'17

1

'18

Common Causes on HYUNDAI ELANTRA

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 HYUNDAI ELANTRA? ▾

P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 3 HYUNDAI ELANTRA owners have reported this to NHTSA.

What are the most common causes of P0300 on HYUNDAI ELANTRA? ▾

Based on 3 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 HYUNDAI ELANTRA? ▾

Of 3 NHTSA reports for this code on HYUNDAI ELANTRA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HYUNDAI ELANTRA 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.