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DTC codes / P0Dxx · Hybrid propulsion / P0D19
P0D19 indicates that the battery charging system's high-voltage interlock circuit is reporting an intermittent or erratic signal, meaning the safety loop that confirms all high-voltage connectors are properly seated is not providing a stable, continuous connection. The computer detects this when the interlock circuit voltage or continuity momentarily drops out or fluctuates beyond expected limits, often without a hard failure.
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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