Guide To P0305 OBD Error Code Solutions

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This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

The OBD code P0305 can be defined as Cylinder 5 Misfire Detected. There are many vehicles which have 4-6 cylinders. A spark plug is fired by each and every cylinder in a very smooth as well as continuous manner. Then a spark plug fires a spark by using a flammable fuel air mixture and would set fire to the fuel. Energy is then released by the fuel which will power the crankshaft, which must turn smoothly on a continuous basis as the car is moving.

What causes this problem with the Cylinder 5 Misfire Detected?

• The spark plug might not be firing for cylinder number 5 due to fouling or cracks in insulation
• The ignition coil for cylinder number 5 might have stopped firing
• There can be spark plug wire or plug boot which is leaking ignition spark to ground for cylinder number 5
• The valve cover is leaking oil into the spark plug holes and shorting the spark plug firing for cylinder number 5

1. Fuel Injector - The P0305 code can also arise due to some issues in Fuel Injector. So it is advised to replace them as soon as possible.
2. Camshaft Sensor - Do you remember when was the last time you got your car en Camshaft Sensor checked up? A damaged Camshaft Sensor can cause a lot of issues like displaying P0305 code.
3. Crankshaft Sensor - Crankshaft Sensor is an important car part which should never be neglected. May be there is some fault in it due to which P0305 code may start flashing.
4. Head Gasket - Is your Head Gasket damaged or broken? Don’t worry as we have solutions for all your problems.
5. Oxygen Sensor - Defective car Oxygen Sensor can be a major reason why P0305 code depicts. So, make sure to replace it online so that you don’t have to face any further issues.
6. Powertrain Control Module - Everything is okay with the Fuel Injector and still OBD code P0305 triggering? Then there must be some defects in Powertrain Control Module. Replace them as soon as possible.
7. Spark Plug - Spark Plug is an important auto part. Take care of it and you can rely on us to purchase best quality Spark Plug online.

Willing to know some common symptoms of OBD Trouble Code P0305? Your wish is our demand. Have a look at them below:

Common Symptoms

• There can be an illumination in the check engine light and the code might be set in ECM memory
• The check engine light may flash during a misfire event which would indicate a catalyst damage
• The engine will have a misfire causing a buck or jerk and a rough idle
• Issue of lack of power in the engine during acceleration while the misfire is active

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0305:

• You should replace the faulty spark plug or replacing all spark plugs as the failure might be due to a worn-out plug
• The leaking valve cover gasket should be replaced then replacing the failed coil, plug wires, and plugs

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• Scan the codes and document the freeze frame data in order to verify the issue
• The engine should be cleared and ETC codes to verify concern comes back
• Road test the vehicle to verify the misfire to cylinder 5
• Carefully remove cylinder 5 ignition coil or plug wire and check for evidence of spark tracking on outside of coil or plug boot. You should also look for oil contamination from a leaking valve cover
• The cylinder spark plug should be removed and checked at the same time you should replace or switch to a different cylinder to see if misfire moves to the other cylinder
• Inspect the cylinder compression if no ignition problems are found

Common Mistakes When Diagnosing The P0305 Code

• The most common mistake can be not switching the coil to a different cylinder and rescanning to see if the misfire moves to another cylinder to check if it is the coil that is bad
• The other big mistake can be not switching one part at a time with a different cylinder to isolate the failed part