The engine computer has detected a voltage signal higher than the normal operating range on the primary control circuit for ignition coil J. This typically indicates an open circuit or a short to power, preventing the coil from triggering the spark.
Internal failure of the coil's primary windings or integrated electronics causing a circuit high condition.
Frayed, broken, or chafed wires causing an open circuit or a short to a power source.
Corrosion or contamination in the electrical connector pins leading to high resistance or signal loss.
A failure in the ignition coil driver circuit within the engine control module.
No. P2328 is an electrical circuit code referring to the control signal between the computer and the coil; spark plug wear typically triggers misfire codes (P0300 series) rather than circuit high codes.
It is very unlikely. While the PCM is listed as a possible cause, the vast majority of P2328 cases are resolved by replacing the coil or repairing the wiring. Replacing the PCM without first verifying the circuit is generally incorrect.
The vehicle can be driven, but it will operate on fewer cylinders, which reduces power and can lead to overheating or damage to the catalytic converters due to unburned fuel.