Faulty Ignition Coil Symptoms - P0351 Code

　　What is the P0351 code?

　　P0351 code means ignition system failure, ignition coil A primary/secondary circuit to be extracted. It is universally applicable to all car manufacturers.

　　Basic knowledge related to the P0351 code

　　1. The position and function of the ignition coil: The coil group is generally located on the isolation plate in the engine room. It acts as a transformer to convert low battery voltage to high voltage.

　　2. Ignition coil group structure: The engine coil has two coils, called the primary coil and the secondary coil. One end of the primary coil is connected to the low-voltage car battery (+), and the other end is connected to the ignition switch. One end of the secondary coil is connected to the primary coil, and the other end is connected to the high-voltage output end. It plays an important role in the ignition performance of the engine. cause of issue

　　When the igniter receives the IGT signal from the engine ECU, the ignition transistor will cut off the circuit of the primary coil and generate a high voltage of up to tens of thousands of volts in the secondary coil to generate high energy for the spark plug. If the spark plug fires successfully, the IGF signal will be sent to the ECU. If the ignition fails, the ECU will not receive the signal, so the p0351 code will appear. Ignition coil A is the coil group of the first cylinder. So the p0351 code is a problem with the first cylinder ignition coil.

　　suggestions and solutions

　　1. Suggestions:

　　a) Check whether the ignition coil is dirty, damp, aged, or damaged;

　　b) Whether the battery voltage is abnormal;

　　C). Whether the spark plug is faulty;

　　d) Whether the ignition coil is short-circuited or poorly connected.

　　2. Solution:

　　A sort of). Clean the surface of the engine coil and protect it from moisture to maintain its good insulating properties.

　　b) Replace damaged or abnormal ignition coils in time.

　　C) Replace the spark plug and spark plug wire.

　　D) Repair or replace the ignition coil connector.