What is the P0354 fault codes? What is the description of Ignition Coil “D” Primary/Secondary Circuit Failure? How can you fix the fault code P0354? What are the symptoms and causes for the P0354 fault code
What is the P0354 Fault code? What does it signify?
The powertrain management module (PCM), manages the ignition coils so that the spark plugs start at the correct moment. If the PCM detects a potential problem with the ignition coil “D” (cylinder #4 is the ignition coil) or its circuit, a code P0354 will be set. If cylinders are addressed using letters, “A”, is cylinder 1, and “B”, is cylinder 2. Continue reading.
There are several ignition systems to choose from, such as single coil, distributor and multi coil (COP/Coil on Plug). Commonly, fault code P0354 can be found in COP ignition systems.
The COP ignition uses a sparkplug on each cylinder and an igniter coil on each sparkplug. This eliminates the need of spark plug wires. Each coil has two wires. The first is the power supply center’s battery supply. The ground circuit from your PCM is the other wire. This circuit is used by the PCM to enable or disable coil operation.
The PCM continuously monitors the ground circuit. When it detects faults, the PCM sets a fault code. Fault codes P0350 through P0362 refer to faults in the ignition coil circuit from cylinder 1 up to cylinder 12. The number at end of the code indicates which cylinder has the fault. For example, P0351 denotes cylinder 1, while P0354 indicates that cylinder 4. P0354 is indicative of cylinder 4 and P0362 is indicative of a fault with the cylinder 12 ignition circuit. P0350, a generic code, simply refers to an ignition coil circuit malfunction.
There are two windings inside the ignition coil. The primary circuit is made up of the low voltage coil. The secondary circuit is the part that converts the primary winding’s electric current to high voltage through inducing. To ignite the spark plugs, the ignition coils convert the low voltage current from battery to high voltage. This means that if one of the ignition coil circuits fails, it will not work properly and can lead to engine problems.
What causes the P0354 Fault code?
Below are some reasons to set fault code P0354:
- – Defective ignition coil (cylinder 4)
- – An issue with the ignition coil circuit
- – Defective idle control valve
- – One or more spark plugs are damaged
- – Leakage in the manifold vacuum
- – Carbon buildup in throttle body air passages
- – The PCM is not functioning properly or requires software updates
What are the symptoms of P0354 Malfunction Code?
You may experience the following symptoms if your vehicle has the code P0354:
- – Illumination for the check engine light
- – Fluctuations of idle speed
- Engine misfires can be intermittent or constant.
- – Misfire during acceleration
- – The engine might run very hard
- – In some vehicles, the PCM can be programmed to turn off the fuel injector in case of an ignition coil failure.
How to Fix the P0354 Fault Code
Is your engine stalling right now? The problem may be intermittent, if the engine doesn’t start up again. With the engine running, try wiggling the coil wires until you reach cylinder 4. If the car doesn’t start, you can fix the problem cable or connectors.
- – Replacing or fixing a leaky manifold vacuum
- – Replacing damaged wires and connectors to the ignition coil(s).
- – Replacing incompatible or faulty spark plugs
- – Replacing/repairing ignition coils
How serious is the P0354 Fault code?
The vehicle might misfire when the P0354 code has been set. This can be especially true during acceleration. This can lead to dangerous situations, especially when the engine is performing at its best.
