Hyundai HB-20 - ignition coil replacement

Passo 1

One of the engine failure problems can be caused by a defect in one of the four ignition coils. There is one coil for each cylinder. They are mounted on the cylinder spark plugs.

Passo 2

To capture engine information and fault indications, you will need a Bluetooth OBD interface and a Car OBD Scanner app. In my case, I used Car Scanner ELM OBD2 (Google Play store for Android apps).

Passo 3

Use an Android smartphone or tablet to install the Car Scanner OBD app. Once installed, open the application

Passo 4

In the Car Scanner ELM OBD2 application, select Fault Codes (DTC) on the main screen and search for the defect. The defect in my car was due to a failure in the Cylinder 2 ignition coil.

Passo 5

This is a disassembled and defective ignition coil. It receives low voltage pulses through the connector at the top and generates high voltage pulses on the spark plug.

Passo 6

Wait for the engine to cool down. If the engine is hot, it could burn your hand.

Passo 7

Cylinder count is from left to right, as in the image.

Passo 8

With the ignition coil removed, check if there is any dirt inside the engine, on the spark plug. Clean it if necessary. Also check the good condition of the connector.

Passo 9

Insert the new ignition coil into place. To facilitate assembly, fit the connector to the coil first. Screw it in with the socket wrench. After everything is assembled, press the gray connector latch. Make sure everything is securely fastened.

Passo 10

After starting the engine, the engine failure indication on the dashboard may go off after moving the car. Or if you want, there is an option in the application to delete this indicator.