P2314 Code: Ignition Coil “E” Secondary Circuit

An ignition coil activates a spark plug by transforming low voltage primary current into high voltage secondary current. As the driver turns on the ignition switch, voltage runs through the coil’s positive and negative terminals given that the primary windings have continuity. These processes ignite the air-fuel mixture inside the combustion chambers. If the powertrain control module (PCM) detects a problem with the ignition coil/s, on-board diagnostics (OBD) will log a P2314 code.

What Does the P2314 Code Mean?

Diagnostic trouble code (DTC) P2314 stands for “Ignition Coil ‘E’ Secondary Circuit.”

An ignition coil has a positive and negative terminal with the latter connected to a control module. This opens and closes the ground return path of the primary ignition circuit.

When the current is shut off, high voltage is generated in the secondary windings and the electromagnetic field around the ferrous of the coil collapses.

Transistors in the PCM turn the ignition coils on and off. Once the PCM is unable to control the ignition coil designated “E”, a P2314 will be stored.

You may also watch this video to understand how ignition coil works:

Note: The definition of code P2314 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P2314 Code?

• Ignition coil failure
• PCM failure
• Bad spark plug or spark plug wire
• Malfunctioning relay
• Blown fuse
• Circuit issues, such as a damaged wire or poor connection

What are the Common Symptoms of the P2314 Code?

• Illuminated check engine light
• Poor fuel economy
• Decreased engine performance
• Engine misfire

How to Diagnose the P2314 Code

DTC P2314 is a generic powertrain code that can be logged in vehicles with an OBD-II system. While this might be the case, keep in mind that the steps for diagnosis and repair can vary, depending on vehicle specifications.

Diagnosing trouble codes will require you to use certain tools and keep an eye out for visible damage in the affected system. If you’re not sure what to look for, it might be best to have a certified mechanic inspect your vehicle for you.

But if you think you can work your way around diagnosing trouble codes, then you can go ahead and do it yourself.

How to Fix the P2314 Code

Attempting to fix a P2314 code can be confusing and frustrating especially if you lack the technical knowledge and equipment. Under these circumstances, it’s best to have a trained professional do the necessary repairs for you to ensure that all steps and protocols are followed correctly.

But if you think you know enough about automotive repair to do resolve the trouble code on your own, make sure you have the right manuals before proceeding. Keep in mind that there is no umbrella fix for all codes, so having vehicle-specific repair information is a must. You can check out guides like those from Chilton or an ALLDATA subscription to get make-model-specific information before working on your vehicle.