P0361 - Ignition Coil K Primary/Secondary Circuit Malfunction

P0361 is triggered when the Engine Control Unit (ECU) detects an electrical abnormality in the primary or secondary circuit of ignition coil 'K' (typically corresponding to cylinder 11). The ECU monitors the primary circuit's diagnostic feedback (Ion sense or current monitoring). If the ECU detects an open circuit, short to ground, or short to voltage during the dwell period or discharge phase, the DTC is stored. This disruption in the combustion cycle often causes the ECU to enter a safety mode where fuel injection to the affected cylinder is disabled to prevent catalytic converter damage.