P0303 — Cylinder 3 misfire detected.

Code P0303 is a standard OBD-II diagnostic trouble code: Cylinder 3 misfire detected.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0303 across 172 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 P0303 172 patterns · top 60

2022 Honda Ridgeline

engine — Intermittent misfire and loss of power after extended highway driving in cold weather

2022 Honda Accord

engine — Cylinder Head Crack / Porosity

2022 Hyundai Tucson

engine — Fuel injector failure with sudden stall and power loss

2022 Hyundai Tucson

powertrain — Sudden Power Loss / Loss of Acceleration

2022 Hyundai Santa Fe

engine — Cylinder misfire — intermittent

2021 Chevrolet Silverado

engine — Lifter failure / collapse

2021 GMC Sierra

powertrain — Engine Lifter and Valvetrain Failure

2021 Honda Ridgeline

engine — Cold-weather limp mode after extended highway driving

2021 Jeep Gladiator

engine — Camshaft Failure and Valve Train Damage

2020 Chrysler Pacifica

engine — Head Gasket Failure with Coolant Leak

2020 Ford Escape

electrical — Engine turbo rattle on cold start

2020 Hyundai Palisade

engine — Excessive oil consumption without warning lights

2020 Jeep Grand Cherokee

engine — Camshaft and rocker arm/lifter wear and failure

2020 Kia Telluride

powertrain — Excessive Oil Consumption / Piston Ring Failure

2020 Kia Telluride

engine — Excessive oil consumption

2020 Mercedes-Benz GLE-Class

engine — Cylinder Head Failure

2020 RAM 2500

engine — High-Pressure Fuel Pump (HPFP) / CP4.2 Injection Pump Failure

2019 Chrysler Pacifica

powertrain — Cylinder Misfire and Head Gasket Failure

2019 Chrysler Pacifica

engine — Intake valve stuck in low lift position (P105C code)

2019 Ford Fusion

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

2019 Ford Escape

powertrain — Coolant intrusion—engine 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 Fit

engine — Carbon Buildup and Misfires

2019 Hyundai Sonata

engine — Excessive Oil Consumption (Internal Leak)

2019 Hyundai Santa Fe

engine — Engine Misfire / Single Cylinder Failure

2019 Lincoln MKC

engine — Coolant Intrusion into Cylinders

2019 Toyota Camry

electrical — Ignition coil failure / engine misfire and stalling

2018 Chrysler Pacifica

engine — Head gasket failure with coolant intrusion

2018 Chrysler Pacifica

powertrain — Engine misfire and head gasket failure

2018 Ford Explorer

engine — Coolant intrusion into cylinders and oil

2018 Ford Edge

engine — Coolant Intrusion into Cylinders

2018 Ford Fusion

powertrain — Coolant Intrusion into Engine Block (1.5L & 2.0L EcoBoost)

2018 Ford Mustang

engine — Coolant Intrusion into Cylinders (2.3L EcoBoost)

2018 Ford Ecosport

engine — Oil pump belt tensioner failure causing low oil pressure and engine failure

2018 Ford Edge

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

2018 Ford Escape

powertrain — Coolant intrusion into cylinders (1.5L EcoBoost engine)

2018 Ford Escape

engine — Coolant intrusion into engine cylinders

2018 Ford Ecosport

powertrain — Oil pump belt/tensioner failure leading to engine seizure

2018 Ford Mustang

powertrain — Engine misfire and fractured intake valve

2018 Ford Fusion

electrical — Misfire and Coolant Loss Without Visible Leak

2018 Honda Odyssey

engine — Connecting Rod Bearing Seizure/Spun Bearing

2018 Honda Accord

engine — Oil dilution and fuel injector contamination

2018 Honda Accord

fuel system — Turbocharger and engine component degradation

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

electrical — Electrical System Cascading Failure (Multiple Safety Systems)

2018 Hyundai Elantra

engine — Ignition coil pack failures and recurring misfires

2018 Hyundai Elantra

electrical — Engine Stalling & Loss of Power

2018 Jeep Grand Cherokee

engine — Head gasket and cylinder head failure

2018 Kia Soul

engine — Piston Ring Failure / Low Compression

2018 Kia Sportage

engine — Excessive oil consumption leading to low oil pressure and engine damage

2018 Kia Optima

electrical — Repeated stalling and engine shutdown

2018 Kia Stinger

engine — Cylinder misfire and engine failure

2018 Lincoln MKC

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

2018 Mazda CX-9

engine — Cracked cylinder head with coolant leak

2017 Audi Q7

engine — Excessive engine oil consumption

2017 Chevrolet Equinox

engine — PCV System Freezing and Rear Main Seal 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 →