The majority of modern vehicles use a coil-on plug (COP) system. This eliminates the requirement for spark plugs, distributor caps and wires. The ignition coil in this system is located directly above the plug. Each cylinder has its own coil, which is constantly monitored by the Powertrain Control Module (PCM/ECM). Each coil is equipped with two wires. The battery powers one wire. The PCM communicates with the other wire. This circuit is used by the PCM to activate or deactivate coils. If the PCM detects a short or open circuit in the circuit or ignition coil of cylinder 5, the PCM generates the fault code P0355. It may also turn off the fuel injector that supplies the cylinder, depending on your vehicle.
Table of Contents
What are the symptoms of fault code P0355?
- Engine fault light illuminates
- Continuous or intermittent misfires
- Idle fluctuations
- Reduced acceleration and stuttering
- Difficulty in starting the vehicle
What are the causes of fault code P0355?
- The ignition coil of cylinder 5 is faulty.
- It may have an open circuit or a short circuit.
- A loose or broken cable connector that leads to the ignition coil
- PCM Faulty
How to Fix Fault Code P0355?
Test the engine if it misfires intermittently by wiggling the coil wires in cylinder 5. Repair the wires if the problem persists.
- Repair or replacement the ignition coil, and/or the wiring harness within the circuit
- Replacement the ignition coil connector
- Replacement ignition coil
- Cleaning carbon deposits in the air passages of your engine or throttle body
How Important is Fault Code P0355?
Problems with ignition coils or ignition coil circuits can have a significant impact on engine performance and driveability. Unaddressed problems can cause further damage to the engine and expensive repairs.
