P2301 Fault Code

Ignition Coil A Primary Control Circuit High

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

The P2301 fault code indicates a problem within the ignition coil A primary control circuit, which is responsible for regulating the voltage to the ignition coil. When this circuit detects a high voltage reading, it raises a warning to the engine control module (ECM).

What are the symptoms of the P2301 code?

Common symptoms associated with a P2301 fault code may include:

• Engine misfires or rough idling
• Difficulty starting the engine
• Decreased engine performance or fuel efficiency
• Check Engine Light illuminated on the dashboard
• Increased emissions output

What causes the P2301 code?

This issue can stem from several sources, including:

• Faulty ignition coil
• Damaged wiring or connections in the ignition circuit
• A malfunctioning ECM
• Poor grounding or corroded connectors
• Issues with the ignition switch

How to fix P2301?

To resolve a P2301 fault code, follow these steps:

• Inspect the ignition coil and replace it if defective.
• Examine wiring and connectors for damage, corrosion, or loose connections, repairing or replacing as necessary.
• Test the ECM for faults and ensure it is functioning correctly.
• Check the ignition switch and ground points, fixing any issues found.
• Clear the code and test drive to see if the issue reoccurs.