P0304 — Cylinder 4 misfire detected.

Code P0304 is a standard OBD-II diagnostic trouble code: Cylinder 4 misfire detected.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0304 across 164 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P0304 164 patterns · top 60

2023 Chevrolet Silverado

powertrain — Engine ticking/clicking noise and lifter failure (6.2L engine)

2022 Chevrolet Silverado

engine — Catastrophic engine seizure and loss of propulsion

2022 Honda Accord

electrical — Fuel System Misfire and Limp-Mode Derating

2022 Hyundai Tucson

powertrain — Cylinder Misfire from Faulty Fuel Injectors

2022 Hyundai Santa Cruz

powertrain — Transmission power loss and shift failure

2022 Kia Sorento

powertrain — Engine misfiring and performance loss

2022 Volkswagen Taos

cruise control — Accelerator Unresponsiveness / Delayed Throttle Response

2021 Jeep Grand Cherokee

engine — Oil and coolant mixing

2021 Kia Seltos

engine — Excessive oil consumption and piston ring failure

2021 Mazda Mazda3

engine — Cylinder Misfire (Code P0304)

2020 Chevrolet Silverado

engine — Lifter and camshaft failure

2020 Chrysler Pacifica

engine — Head Gasket Failure with Coolant Leak

2020 Honda Accord

engine — Head gasket failure

2020 Jeep Compass

powertrain — Cylinder head gasket failure & combustion gas ingress

2020 Kia Telluride

powertrain — Excessive Oil Consumption / Piston Ring Failure

2020 Kia Optima

engine — Rod bearing and internal engine damage

2020 Kia Soul

engine — Piston ring defect causing oil loss, burning, and engine damage

2020 Kia Sorento

engine — Cylinder Misfire and Check Engine Light

2020 Mercedes-Benz GLE-Class

engine — Cylinder Head Failure

2019 Acura RDX

engine — Sudden Power Loss / Limp Mode During Acceleration

2019 Ford Fusion

engine — Coolant intrusion into cylinders (head gasket/block defect)

2019 Ford Escape

engine — Coolant Intrusion into Cylinders

2019 Ford Mustang

engine — Coolant Intrusion into Cylinders

2019 Ford Escape

steering — Engine Shaking, Coolant Intrusion & Electronic Power Steering Gear Failure

2019 Honda Accord

electrical — Engine stall / loss of power at highway speed

2019 Honda Accord

engine — Blown Head Gasket with Coolant Intrusion

2019 Honda Accord

cruise control — Loss of acceleration and engine performance issues

2019 Honda CR-V

powertrain — Fuel Injector Leakage and Oil Dilution

2019 Honda Fit

engine — Carbon Buildup and Misfires

2019 Hyundai Elantra

engine — Piston Ring Failure & Cylinder Scoring

2019 Kia Optima

engine — Cylinder Misfire / Oil Intrusion into Spark Plugs

2019 Kia Sorento

engine — Complete Engine Failure (Seizure, Crankshaft Snap, Valve Cracks, Cylinder Failure)

2019 Mazda CX-5

electrical — Transmission Jerking / Limp Mode with Misfire Codes

2019 Nissan Rogue Sport

brakes — Automatic Emergency Braking (AEB) system nuisance activation

2019 Subaru Crosstrek

engine — Ignition coil failure – recurrence after recall

2019 Toyota Camry

electrical — Ignition coil failure / engine misfire and stalling

2018 Chrysler Pacifica

powertrain — Engine misfire and head gasket failure

2018 Ford Fusion

engine — Coolant intrusion into cylinder(s)

2018 Ford Edge

powertrain — Coolant intrusion into cylinders (2.0L EcoBoost engine)

2018 Ford Escape

engine — Coolant intrusion into engine cylinders

2018 Ford Fusion

electrical — Misfire and Coolant Loss Without Visible Leak

2018 Honda Accord

cruise control — Engine stalling and power loss while driving

2018 Honda Accord

engine — Oil dilution and fuel injector contamination

2018 Honda Accord

electrical — Fuel Pump Failure

2018 Honda Accord

powertrain — Head Gasket Failure / Coolant Intrusion

2018 Honda CR-V

powertrain — Engine oil dilution by gasoline

2018 Honda Civic

engine — Oil dilution with fuel (1.5L turbo engine)

2018 Honda Fit

engine — Carbon buildup on intake valves and fuel injector failures

2018 Hyundai Elantra

engine — Ignition coil pack failures and recurring misfires

2018 Hyundai Santa Fe Sport

engine — Excessive Oil Consumption

2018 Hyundai Santa Fe

engine — Fuel Injector Failure (Bank 2)

2018 Jeep Grand Cherokee

engine — Head gasket and cylinder head failure

2018 Lincoln MKC

engine — Coolant Intrusion into Cylinders with Cracked Engine Block or Head

2018 Toyota Camry

engine — Transmission Jerking, Slipping, and Hesitation

2017 Acura RDX

electrical — Loss of power / engine cutout with all warning lights

2017 Audi Q7

engine — Drive System Malfunction with power loss and limp mode

2017 Cadillac Escalade

powertrain — AFM valve lifter collapse

2017 Chevrolet Silverado

engine — AFM/DFM Lifter Collapse

2017 Dodge Charger

powertrain — Cylinder 4 misfire and power loss

2017 Ford Escape

engine — Coolant Intrusion into Cylinders with Head Gasket Failure

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →