P2304 Fault Code

Ignition Coil B Primary Control Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2304 fault code refers to a problem with the ignition coil B primary control circuit, noting that it is operating at a high voltage. This could suggest an issue with the coil itself or the circuit that controls it. Proper ignition coil function is crucial for optimal engine performance, as it is responsible for generating the spark needed for combustion.

What are the symptoms of the P2304 code?

Common symptoms associated with the P2304 code include:

• Engine misfire that may lead to a rough idle.
• Reduced engine power and acceleration.
• Difficulty starting the engine or no start condition.
• Increased emissions due to incomplete combustion.

What causes the P2304 code?

Several factors can lead to the P2304 code being triggered, including:

• A defective ignition coil B which may be failing to operate within the required voltage range.
• Faulty wiring or connectors affecting the signal to the coil.
• Problems in the power supply circuit leading to excessive voltage.
• Malfunctioning Engine Control Unit (ECU) that mismanages the ignition coil operations.

How to fix P2304?

To resolve the P2304 code, consider taking the following steps:

• Inspect the ignition coil B for any visible damage or signs of excessive wear and replace it if necessary.
• Check the wiring and connectors leading to the ignition coil B for any frayed wires or loose connections; repair or replace as needed.
• Test the vehicle’s battery and charging system to ensure proper voltage is being supplied.
• If all hardware appears functional, consider examining the ECU for potential faults that may be misreporting or causing the excessive voltage condition.