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P0350 OBD-II Trouble Code: P0350 Ignition Coil Primary/Secondary Circuit Malfunction

check engine light

P0350 code definition

A P0350 indicates that the Powertrain Control Module (PCM) has detected a malfunction in the circuit of one or more of the engine's ignition coils.

What the P0350 code means

The P0350 code refers to an input problem relating to the engine's ignition coils. The PCM controls and monitors the performance of the ignition coils. A malfunction will have potentially significant effects on your vehicle's engine performance depending on the severity of the malfunction.

What causes the P0350 code?

A P0350 code is logged in with the vehicle's computer whenever a recorded voltage differs from the manufacturer's default setting by more than 10%. This anomaly could be caused by a faulty or broken ignition coil, disconnected or corroded wiring, loose connectors or a malfunctioning PCM.

What are the symptoms of the P0350 code?

The P0350 code will negatively affect an engine's performance. Issues with engine stalling and acceleration are also commonly reported. For the sake of diagnosis, a malfunction warning dashboard light and trouble code will be logged in the vehicle.

How does a mechanic diagnose the P0350 code?

Special attention should be placed on the circuits between the PCM and ignition coils, as well as the ignition coils themselves. Disconnected ignition coils may be identified by shaking them gently by hand and seeing if they budge. A P0350 is often caused by a problem with the electrical circuit. The wiring and electrical connectors should be thoroughly inspected. If the ignition coils and wiring have both checked out, the possibility of a faulty PCM may be considered.

Common mistakes when diagnosing the P0350 code

Solving a P0350 code may be mistakenly approached by simply performing maintenance. While this may be the thing the system needs, faulty components or wiring should not be ruled out as possible causes.

How serious is the P0350 code?

Although the vehicle should remain relatively operable in the instance of a P0350 code, it may significant affect the drivability, particularly with regards to engine stalling and acceleration. Because a P0350 runs the risk of stalling your engine, it should be repaired as soon as possible in order to prevent driving safety risks.

What repairs can fix the P0350 code?

If any components related to the ignition coil system (including the PCM) have been identified as faulty, they should be repaired or replaced as is needed. If there is an issue with the wiring or connectors, the circuit between the PCM and affected ignition coil should be reconnected or replaced as necessary. The ignition system should be retested after each individual repair in order to identify the source of the problem.

Additional comments for consideration regarding the P0350 code

Ignition coils are controlled directly by the PCM, so any connections between the two should be focused on while diagnosing and repairing the code. Other trouble codes relating to the PCM and ignition coils may complicate identifying the problem.

Need help with a P0350 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
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