This diagnostic trouble code indicates a fault within a specific segment of the High Voltage Interlock Loop safety circuit. The vehicle control system disables high-voltage power distribution when this circuit is open to prevent electrical shock hazards.
Physical connectors may not be fully latched, breaking the low-voltage safety loop.
Wear, chafing, or impact damage can sever the interlock signal wire within the harness.
Internal safety switches within inverters or battery junction boxes may fail open.
Moisture intrusion can cause oxidation that prevents proper electrical continuity.
The manual service disconnect may be loose or improperly installed after maintenance.
Internal failure of the monitoring module is possible but statistically rare compared to wiring issues.
No, the vehicle may lose power unexpectedly as the high-voltage system is disabled for safety.
Not necessarily, this code points to the safety interlock loop rather than battery cell health.
No, control module failure is rare; inspect wiring and connectors first as they are the primary causes.
The code will return until the physical fault in the interlock circuit is repaired and verified.