P0351 Fault Code

Ignition Coil A Primary/Secondary Circuit Malfunction

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

The P0351 fault code indicates a malfunction in the ignition coil A primary and secondary circuit. This means that there is a problem with the electrical components related to the ignition coil, which is responsible for generating the high voltage necessary to ignite the air/fuel mixture in the engine's cylinders. Diagnosing this issue typically involves checking the wiring, connectors, and the ignition coil itself.

What are the symptoms of the P0351 code?

Symptoms of a P0351 fault code may include:

• Engine misfire or rough running
• Decreased engine performance and acceleration
• Illuminated check engine light (CEL)
• Difficulty starting the engine
• Increased emissions

What causes the P0351 code?

Common causes for the P0351 code include:

• Damaged or corroded wiring in the ignition coil circuit
• Faulty ignition coil A
• Issues with the ignition control module (ICM)
• Poor connections at the coil connector
• Faulty engine control module (ECM)

How to fix P0351?

To fix the P0351 code, follow these steps:

1. Inspect the wiring and connectors associated with ignition coil A for any damage or corrosion.
2. Test the ignition coil A for proper operation using a multimeter.
3. Replace or repair any damaged or faulty components found during diagnostics.
4. Clear the codes and test drive the vehicle to see if the code comes back.