Fault Family System: Powertrain (P-Codes) 5 SAE Codes

HV Battery Precharge Discharge Timing

Diagnostic & Technical Explanation

Code P0C75 sets when the HV battery main contactor precharge/discharge circuit does not complete its resistor-limited precharge or its controlled discharge within the time window the control module expects before or after main-contactor closure. The most common physical causes are a burned-open precharge resistor, a precharge relay that sticks or fails to energize, and an unexpected downstream short or leakage path loading the bus.

These 5 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 5 times.

Codes in this family (5)

Code	Definition	Repair coverage
P0C75	Hybrid/EV Battery System Discharge Time Too Short	3 ranked fixes
P0C76	Hybrid/EV Battery System Discharge Time Too Long	3 ranked fixes
P0C77	Hybrid/EV Battery System Precharge Time Too Short	3 ranked fixes
P0C78	Hybrid/EV Battery System Precharge Time Too Long	3 ranked fixes
P0EED	Hybrid/EV Battery System Discharge Circuit Performance	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)

Need All 15,886 Codes as Data?

Pipe-delimited CSV, Apache Parquet and a relational SQLite database, with commercial application rights and instant download. Built for scan tools, shop software and research - not assembled one web page at a time.

License OEM Complete · $149 Standard (SAE only) · $49

$49 Standard: 9,249 SAE codes · $149 OEM Complete: all 15,886 codes, including 6,637 OEM codes across 32 makes · $149 Heavy Duty: 4,212 fault pairs (J1939) · one-time · compare tiers