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P2310 OBD-II Trouble Code: Ignition Coil D Pri Ctrl Circ High

Check Engine Light

P2310 code definition

The P2310 code indicates a problem with one or more ignition coils on the engine.

What the P2310 code means

The P2310 code indicates that one or more ignition coils on your engine has experienced a fault. Most cars today use a coil-on-plug setup rather than the older distributor, wire and plug system. Ignition coils are controlled by the car’s computer individually to provide better timing and performance. If the computer notices a coil (or coils) with a 10% or greater variance from manufacturer specifications in terms of performance, the P2310 code will be set. Note that this problem may lie with the coil, the wiring from the coil to the computer.

What causes the P2310 code?

The P2310 code can be set for a number of different reasons, including the following:

  • Faulty ignition coil
  • Short or open in the wiring
  • Corroded connector on the ignition coil
  • Failed PCM (rare)

What are the symptoms of the P2310 code?

Symptoms for the P2310 code can vary widely. They include:

How does a mechanic diagnose the P2310 code?

The mechanic will first connect an OBD II scanner to the car’s communication port and check the code or codes. Sometimes, there will be additional codes stored that provide further guidance. The mechanic will then clear the codes and test drive the vehicle to see if the codes reset and to duplicate symptoms.

Next, the mechanic should conduct a visual inspection of all wires and connections. Fraying, damage and loose connections must be repaired prior to any other repair work. The mechanic will need to verify that the engine is misfiring regularly by placing a load on the engine while operating. Next, each individual coil should be checked for looseness and proper fit. This will help identify corroded prongs, as well. A digital voltmeter should then be used to check for continuity in the coils and wiring to the PCM.

Common mistakes when diagnosing the P2310 code

One common mistake here is recommending an engine tune-up to remedy the problem. The issue is that the tune-up will not fix the error that caused the P2310 code. Another mistake is not checking for shorts on top of the engine. Rodents sometimes nest in these areas and can cause damage to the wiring.

How serious is the P2310 code?

The P2310 code is actually very serious. It can have a dramatic effect on the drivability of your car and can eventually cause damage through misfires. Have it diagnosed and repaired immediately.

What repairs can fix the P2310 code?

A number of different repairs may be necessary depending on the actual underlying condition. These include:

Additional comments for consideration regarding the P2310 code

It is important that a mechanic fully inspect the wiring system to verify that there are no opens or shorts present. These issues are often caused by wildlife gnawing on wiring, as well as by contact with hot metal parts under the hood. It is also important to note that while a tune-up before fixing the P2310 code may not be effective at resolving performance problems, one may need to be performed after fixing the problem.

Need help with a P2310 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
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