If your car is showing engine code P2305, that means that there is a voltage problem that is affecting the vehicle's ignition. The issue is generally caused by either a faulty ignition coil or a faulty sparkplug and should be addressed right away.

Using an OBD-II code reader to read diagnostic trouble codes (DTCs) is a great way to identify any problems that your car is having. With that said, discovering an engine code isn’t much help unless you can evaluate and ultimately solve the issue.

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What does engine code P2305 mean?

Definition: Ignition Coil ‘B’ Secondary Circuit

The P2305 engine code indicates that your Powertrain Control Module (PCM) has detected some sort of short or voltage problem related to ignition coil B. This problem can range from a simple issue with the connection of the

ignition coil

to a problem with the PCM itself.

Your car’s ignition coils take the electricity generated by your battery and use it to generate a spark at the spark plug and ignite the fuel. If your ignition coil is not properly powered, it makes things difficult for your engine.

MORE:

How to read spark plugs

How much will it cost to fix?

The price to fix engine code P2305 depends on what is causing the problem. Ignition coils themselves are generally less than $100, but the labor needed to replace one can make things much more expensive.

What can cause the P2305 engine code?.

If you’re reading the P2305 engine code on your OBD code reader, it means that the PCM noticed your ignition coil is not receiving the voltage that is needed. This can happen for one of a few common reasons:

Ignition coil B itself is faulty

Ignition coil B’s harness is faulty or has shorted

Ignition coil B’s circuit has a poor connection

In addition, the root of this problem could be related to your car’s

spark plug

itself, rather than ignition coil B.

MORE:

How to understand car OBD codes

Common symptoms of the P2305 engine code

Since the P2305 engine code relates to your car’s ignition, some common symptoms of the problem include:

The

Check Engine Light has turned on

The engine is running rough

Worse gas mileage than usual

Misfires from the engine

If you notice any general issues with the performance of your engine, that could still be related to engine code P2305.

MORE:

What does Check Engine Light mean?

How serious is engine code P2305?

If your car is showing engine code P2305, you should look to get it fixed right away. Although the car should remain drivable, it likely won’t perform as well as it should.

There are a lot of potential issues that can cause engine code P2305, and figuring out which one it is can go a long way when it comes to peace of mind. When it comes to electrical problems in your car, you want to be proactive about solving them.

Can I fix the P2305 code myself?

If you have the proper tools and understanding of your car’s electrical systems, you can probably fix whatever is causing your car to show engine code P2305. The hardest part is diagnosing the problem, and you’ll want to be thorough when investigating it.

The main thing you’ll have to determine when looking to solve the issue are:

Does ignition coil B seem faulty?

Is the spark plug worn out?

Are there frayed wires or problems with the electrical connections?

Once the problem has been determined, replacing the faulty part can generally be done with a few hours and common tools. However, to ensure that you are buying and replacing the right part, it may be worthwhile to

take your car to a mechanic

MORE:

How to decide if you should take your car to a repair shop or a mobile mechanic

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