Vehicle Questions and Answers
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Driving a Ford F-150 means you'll encounter a range of dashboard codes and lights as you own the vehicle. Typically, these signals indicate it's time for regular maintenance on your fluids and vehicle components. However, when dealing with code P0354, it signifies that the computer (PCM) is unable to receive a signal from the ignition coils. This issue is commonly caused by a malfunction in the module that transmits signals to the coils or a defective secondary spark plug. Replacing the module can range from $40 to $148, while a faulty spark plug replacement may cost between $14 and $50.
I replaced the spark plug coil wires on my car (a Po354), and made sure they weren't touching the air conditioning lines. However, the engine is still misfiring and the air conditioning is blowing hot air.
The OBD P0354 error code means there's a problem with the ignition coil's primary/secondary circuit. It suggests that a short has been detected in the driver circuit.