P0355 - IGNITION COIL AND PRIMARY/SECONDARY CIRCUIT MALFUNCTION
POST UPDATED IN September, 2021
Description of DTC code P0355 Generic
Modern vehicles have eliminated the use of ignition components such as distributor, cap, rotor, and even spark plug wires. They now use only a coil pack that is located directly on top of the spark plug. The purpose of using the coil pack is to convert the low voltage of the primary circuit to high secondary voltage, which is necessary to trigger the plugs.
When the diagnostic code P0355 OBDII is set, it is due to a problem that has been observed in the ignition coil circuit. The last digit of the code refers to the coil where the fault starts. In this case, it indicates a problem in the circuit of coil number 5.
To correct the problems with fault code P0355 OBDII the steps are as follows:
Check the coil pack and its connector. If you see worn or corroded wires, repair or replace them.
Make sure the electrical connections are not poor or rubbing against other components.
By using a voltmeter and the alternating current scale, if the result is between 5 and 20 Hertz or more, the controller works, change the coil.
If there is no signal from the PCM in the coil circuit, leave the coil disconnected and check the DC voltage in the connector circuit. If there is a significant voltage, it means that there is a short, repair it.
To check the status of the coil, change the coil with another cylinder. If the ignition failure changes indicating that the cylinder with the exchanged coil is failing, the coil is defective, replace it.