Fault Family System: Powertrain (P-Codes) 7 SAE Codes

HV Battery Contactor Control Supply

Diagnostic & Technical Explanation

Code P2C92 (Hybrid/EV Battery Contactor Control Supply Circuit/Open) covers the low-voltage supply feeding the HV battery pack's contactor control circuitry, and the dedicated disable circuit that can force all pack contactors open as a safety measure - both distinct from an individual contactor's own coil-drive fault codes. The ECM flags an open, shorted, or out-of-range condition. Causes are a corroded low-voltage connector at the battery management system, a blown fuse in the contactor control supply, or damaged control wiring inside the pack enclosure.

These 7 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 7 times.

Codes in this family (7)

Code	Definition	Repair coverage
P2C92	Hybrid/EV Battery Contactor Control Supply Circuit/Open	3 ranked fixes
P2C93	Hybrid/EV Battery Contactor Control Supply Circuit Range/Performance	3 ranked fixes
P2C94	Hybrid/EV Battery Contactor Control Supply Circuit Low	3 ranked fixes
P2C95	Hybrid/EV Battery Contactor Control Supply Circuit High	3 ranked fixes
P2C96	Hybrid/EV Battery Disable Circuit/Open	3 ranked fixes
P2C97	Hybrid/EV Battery Disable Circuit Low	3 ranked fixes
P2C98	Hybrid/EV Battery Disable Circuit High	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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