P0300 on HYUNDAI TUCSON — Random/Multiple Cylinder Misfire Detected

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

"P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 6 HYUNDAI TUCSON owners have reported this to NHTSA."

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

"Based on 6 NHTSA reports, the most commonly cited components are: Engine, Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0300 serious on my HYUNDAI TUCSON?"

"Of 6 NHTSA reports for this code on HYUNDAI TUCSON, 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 TUCSON 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 TUCSON

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.

6 HYUNDAI TUCSON owners have reported this issue to NHTSA across model years 2015-2017. Most reports come from the 2017, 2015 model years. The most commonly reported component is Engine (83.3% of reports).

Real HYUNDAI TUCSON Owner Reports

Source: NHTSA Complaints Database

"The contact owns a 2015 Hyundai Tucson. The contact stated that the engine was seized. The contact was unaware if any warning lights were illuminated. The vehicle was towed to the local dealer and the mechanic retrieved fault codes: P0014, P0300, P0301, and P0441."

— 2015 HYUNDAI TUCSON owner · ENGINE · Filed 04/15/2022

"My 2016 Hyundai Tucson has had power and acceleration issues since I purchased it brand new in 2016 from the dealership. When trying to accelerate onto the freeway, or trying to turn onto busy traffic the engine would rev but not pick up speed causing a dangerous situation when traffic is present."

— 2016 HYUNDAI TUCSON owner · ENGINE · Filed 03/26/2024

"My 2017 Hyundai Tucson 1.6 liter is experiencing severe engine issues that closely mirror those subject to recent class action lawsuits. The engine exhibits excessive oil consumption. I have experienced a sudden loss of power on roadways in traffic as well as on the highway."

— 2017 HYUNDAI TUCSON owner · ENGINE · Filed 07/14/2025

"The check engine light started flashing and the vehicle would not go over 25 miles per hour. Thankfully I was pulling into a parking lot when the reduction in speed occurred. If this had happened on the interstate (which I commute on regularly) it could have been extremely dangerous."

— 2017 HYUNDAI TUCSON owner · VEHICLE SPEED CONTROL,ENGINE · Filed 07/10/2023

"After having a level 1 drivability test/inspection test done, code P0300, P1111, P301, P302 & P303 came up. Cylinder compression was tested and found cylinder 3 was at 30 PSI. The technician told me that this is a common issue with this make/model and I should take it to the dealer."

— 2017 HYUNDAI TUCSON owner · ENGINE · Filed 01/21/2023

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

📊 Complaint Trend by Model Year

1

'15

1

'16

4

'17

Common Causes on HYUNDAI TUCSON

Based on NHTSA complaint component analysis for this vehicle.

ENGINE 83.3%

VEHICLE SPEED CONTROL,ENGINE 16.7%

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 TUCSON? ▾

P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 6 HYUNDAI TUCSON owners have reported this to NHTSA.

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

Based on 6 NHTSA reports, the most commonly cited components are: Engine, Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints.

Is P0300 serious on my HYUNDAI TUCSON? ▾

Of 6 NHTSA reports for this code on HYUNDAI TUCSON, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HYUNDAI TUCSON 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.