OBD code P0306 indicates a misfire in cylinder 6. This affects the ignition system.
Symptoms include engine light on, lack of power, hard starting, and engine hesitation.
Causes can be a faulty spark plug, clogged fuel injector, or ignition coil issues.
It’s a moderate issue.
To fix, check and repair the spark plug, fuel injector, or ignition coil in cylinder 6, and inspect related wiring for any damage.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the p0306 OBD Code
The vehicle may experience rough idling or a noticeable lack of power under load.
- With OBD code P0306, the engine light will be ON.
- Lack/loss of power may be experienced.
- Hard starting can occur.
- Engine hesitation might be noticeable.
Causes of the p0306 OBD Code
Do you know you can clear most fault codes—but some could mean serious danger? Don’t take chances with your safety or your family’s safety. This budget-friendly car scanner makes it easy to clear fault codes in seconds while showing you exactly what’s wrong. Plug it in, connect to your Android or iOS phone, and instantly check live data. You’ll know if it’s a minor issue you can clear or something serious that needs attention—so you can drive safely and stress-free. (Today’s Deal)
Fault code P0306 indicates a misfire in cylinder 6 of the engine.
- P0306 can be caused by a faulty spark plug 6.
- Clogged or faulty fuel injector 6.
- Faulty ignition coil 6.
- Fuel injector 6 harness is open or shorted.
- Fuel injector 6 circuit poor electrical connection.
- Ignition coil 6 harness is open or shorted.
- Ignition coil 6 circuit poor electrical connection.
- Insufficient cylinder 6 compression.
- Incorrect fuel pressure.
- Intake air leak.
Fixing Error Code p0306 Step By Step
Address cylinder 6 misfire by checking spark plugs, ignition coil, fuel injector, and compression.
- To fix OBDII code P0306, first, review the possible causes related to cylinder 6 misfire.
- Visually inspect the ignition system components such as spark plugs, ignition coils, and spark plug wires for any signs of wear or damage.
- Check the fuel injector for proper operation and ensure it is delivering fuel to the cylinder.
- Test the compression in cylinder 6 to verify the engine’s mechanical condition.
- If all components check out, consider swapping the ignition coil with another cylinder to see if the misfire follows.
- Finally, reset the vehicle’s engine control module (ECM) to clear the code and monitor the vehicle for any recurring issues.
Cost Of Fixing p0306 Fault Code
Diagnosing and repairing fault code P0306 typically involves addressing cylinder 6 misfire issues.
The cost to diagnose and fix OBD code P0306 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
Costs depend on labor rates, shop fees, and the complexity of the repair needed.
That fault code is a turning point. If repair costs are climbing and your current loan feels like it’s holding you back, this is the time to plan ahead. The free Car Loan Payment Tracker helps you see how quickly you can pay off what’s left—and start preparing, with confidence, for your dream car.
Details of the p0306 OBD Code
Fault code P0306 indicates a misfire in cylinder 6 of the engine.
OBD code P0306 means a misfire was detected in cylinder 6. It’s triggered by the Engine Control Module (ECM) based on crankshaft speed fluctuations.
This code indicates that cylinder 6 is not contributing properly to the engine’s combustion cycle.
It could be caused by issues such as a faulty spark plug, ignition coil, fuel injector, or low compression in that cylinder.
The ECM monitors the crankshaft position sensor signal to detect the misfire in cylinder 6.
Mechanic’s Tech Notes
For fault code P0306, misfire detected in cylinder 6, check ignition system components for issues.
To diagnose and fix OBDII code P0306 (Cylinder 6 Misfire Detected), start by checking the ignition system components like spark plugs, ignition coils, and spark plug wires for any faults.
Use a voltmeter to test the coil’s primary and secondary resistance.
Inspect the fuel injector for proper operation and connection.
Perform a compression test on cylinder 6 to rule out any internal engine issues.
A scan tool can help monitor live data to pinpoint the misfire cause.
Clear the code after repairs and test drive to ensure the issue is resolved.
FAQ
Common causes of OBD code P0306: Faulty spark plug 6, clogged/faulty fuel injector 6, faulty ignition coil 6, poor electrical connections, insufficient cylinder 6 compression.
Diagnose and fix OBD code P0306 by checking spark plug 6, fuel injector 6, and ignition coil 6. Inspect wiring for damage or poor connections.
It is not safe to continue driving with OBD code P0306. Address the possible causes like faulty spark plug, clogged fuel injector, or ignition coil.
Wrap Up
If your check engine light is on and your engine is running rough, you may have OBDII code P0306, indicating a misfire in cylinder 6. This could be caused by a faulty spark plug, ignition coil, fuel injector, or low compression in that cylinder.
To address OBDII code P0306, start by checking the spark plug, ignition coil, and fuel injector for cylinder 6. Inspect the wiring harness and connectors for any damage or corrosion that could be affecting the components’ performance.
Consider performing a compression test to rule out any internal engine issues.
