P0306: Cylinder 6 Misfire Detected
59 vehicles · 20 makes
P0306 is an OBD-II diagnostic trouble code meaning “Cylinder 6 Misfire Detected.” Misfires detected specifically in cylinder 6. Applies to V6, I6, V8, and larger engines. This code appears across 59 vehicle models from 20 manufacturers.
Common Causes
Diagnostic Tools
To diagnose P0306, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (59)
Carbon Buildup on Intake Valves (4.0T Twin-Turbo V8)
2.7T Ignition Coil Pack Failure Causing Misfires and Flashing Check Engine Light
4.2L V8 Carbon Buildup and High-Rev Issues
Intake Valve Carbon Buildup (Direct Injection)
4.2L V8 Carbon Buildup on Intake Valves
S65 V8 Rod Bearing Premature Failure
Valve Cover Gasket Oil Leak
S58 Intake Valve Carbon Buildup
S58 Intake Valve Carbon Buildup
S55 High-Pressure Fuel Injector Failure - F82/F83 M4
S63 Rod Bearing Failure (X6 M)
S85 V10 Rod Bearing Premature Failure (CATASTROPHIC) - E60 M5
S63TU4 Rod Bearing Wear (M8/M8 Competition)
Direct Fuel Injector Failure (S55)
S63 Twin-Turbo V8 Rod Bearing Concerns (F06/F12/F13 M6)
V12 Nikasil Cylinder Bore Wear (M70/M73)
S55 Rod Bearing Premature Wear - F82/F83 M4
S85 V10 Rod Bearing Failure (Catastrophic Engine Destruction)
S63/S63TU Ignition Coil Premature Failure
N55 Rod Bearing Premature Wear - F87 M2
Rod Bearing Wear (S54 Engine)
Ignition Coil Pack Failure Causing Misfires and Check Engine Light on M52TU/M54 Engines
Rod Bearing Failure (S65 V8) - CRITICAL
S63 V8 Rod Bearing Premature Wear & Failure - E70/F85 X5 M
5.3L Vortec AFM Active Fuel Management Oil Consumption and Lifter Failure
AFM/DFM Lifter Failure (5.3L/6.2L V8)
Injector Wiring Harness Chafing (Duramax)
L99 AFM Lifter Failure and Camshaft Damage on 6.2L Automatic Cars
HEMI MDS Lifter Tick
HEMI MDS Lifter Tick
Pentastar V6 Rocker Arm/Lifter Tick
HEMI Lifter/MDS Tick
Pentastar V6 Rocker Arm/Lifter Tick
Rod Bearing Failure from Oil Starvation (Track Use)
1.5L EcoBoost 3-Cylinder Coolant Loss and Engine Failure
4.6L 2-Valve Spark Plug Ejection/Breakage
Ignition Coil Pack Failure
5.4L 2-Valve Spark Plug Blow-Out From Cylinder Head
Fuel Injector Debris Causing Misfires and Catalyst Codes
Spark Plugs Backing Out - Coil Pack Melting and Engine Damage
Timing Belt and Water Pump Neglect Leading to 3.2L V6 Engine Damage
Valve Cover Gasket and Spark Plug Tube Seal Oil Leaks Causing Misfires
Theta II Engine Seizure/Failure
Connecting Rod Bearing Failure (Theta II)
Theta II Engine Seizure Due to Connecting Rod Bearing Failure
Theta II Engine Failure / Connecting Rod Bearing Seizure
Nu Engine Bearing Failure and Seizure
FAQ
What does P0306 mean?
P0306 stands for "Cylinder 6 Misfire Detected." Misfires detected specifically in cylinder 6. Applies to V6, I6, V8, and larger engines.
What are the most common causes of P0306?
The most common causes of P0306 are: Failed ignition coil, Worn spark plug, Clogged fuel injector, Low compression, Intake or exhaust leak. The specific cause varies by vehicle.
How much does it cost to fix P0306?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0306?
Au7o has documented P0306 across 59 vehicle models from 20 manufacturers: Acura, Audi, BMW, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Honda, Hyundai, Jeep, Lexus, Mazda, Nissan, Porsche, RAM, Subaru, Toyota, Volkswagen.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.