DTC codes / P23xx · Ignition system and misfire / P2363
P2363 indicates that the glow plug control module has detected an abnormally high voltage on its power supply circuit, meaning the module is seeing more voltage than it expects on its main feed. The engine control module (ECM) sets this code when the voltage on the glow plug module's power circuit exceeds a calibrated threshold, which can be caused by a wiring fault, a failed module, or a charging system issue.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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