Fault Family System: Powertrain (P-Codes) 10 SAE Codes

Charging System HV Interlock

Diagnostic & Technical Explanation

Code P0D15 sets when the charging-system HV interlock loop — the same daisy-chained low-voltage sense principle as the vehicle-wide interlock, but scoped specifically to the charger's HV connectors and junction-box lids — does not read a closed circuit, so the system inhibits charging as a safety measure. The most common physical causes are a charger-side connector cover or junction-box lid that vibrated loose, a pinched or broken interlock wire within the charger's wiring harness, and a failed interlock-sense pin inside a charger connector. Because this loop only covers the charging-system hardware, a fault here inhibits charging specifically without necessarily affecting the vehicle's ability to drive.

These 10 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 10 times.

Codes in this family (10)

Code	Definition	Repair coverage
P0D15	Battery Charging System A High Voltage Interlock Circuit/Open	3 ranked fixes
P0D16	Battery Charging System A High Voltage Interlock Circuit Performance	3 ranked fixes
P0D17	Battery Charging System A High Voltage Interlock Circuit Low	3 ranked fixes
P0D18	Battery Charging System A High Voltage Interlock Circuit High	3 ranked fixes
P0D19	Battery Charging System A High Voltage Interlock Circuit Intermittent/Erratic	3 ranked fixes
P2DB7	Battery Charging System B High Voltage Interlock Circuit/Open	3 ranked fixes
P2DB8	Battery Charging System B High Voltage Interlock Circuit Performance	3 ranked fixes
P2DB9	Battery Charging System B High Voltage Interlock Circuit Low	3 ranked fixes
P2DBA	Battery Charging System B High Voltage Interlock Circuit High	3 ranked fixes
P2DBB	Battery Charging System B High Voltage Interlock Circuit Intermittent/Erratic	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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