P0304 on HYUNDAI ELANTRA
What P0304 Means on Your HYUNDAI ELANTRA
Real HYUNDAI ELANTRA Owner Reports (Source: NHTSA Complaints Database)
"Drove vehicle to dealer, boucher hyundia of waukesha after the check engine light would go on and off with codes p2096 and p0304. codes are related to cylinder 3 and 4 misfires. dealer found engine making a noise from lower end and recommends an engine replacement."
"Check engine light on with diagnostic error code P0304 cylinder 4 misfire detected ignition coil"
"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"
"I purchased my 2019 Hyundai Elantra from a third-party dealer (Mike Carlson Motor Company in Haltom City, TX) on [XXX]. I have kept the oil changed on a regular basis since I purchased it."
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 HYUNDAI ELANTRA
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
-
1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
-
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.