Fault Family System: Powertrain (P-Codes) 4 SAE Codes

Battery Charger Precharge Discharge Timing

Diagnostic & Technical Explanation

Code P0D25 (Battery Charger System Precharge Time Too Short) sets when the onboard charger's own internal precharge/discharge network does not complete its resistor-limited precharge of the charger's DC output stage, or its controlled discharge after a charge session ends, within the time window the control module expects. Root causes are a burned-open precharge resistor or relay inside the charger housing, a marginal DC output contactor within the charger that cannot fully close, or a downstream short/leakage path on the charger's HV output loading the precharge circuit.

These 4 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 4 times.

Codes in this family (4)

Code	Definition	Repair coverage
P0D25	Battery Charger System Precharge Time Too Short	3 ranked fixes
P0D26	Battery Charger System Precharge Time Too Long	3 ranked fixes
P0D5D	Battery Charger Hybrid/EV System Discharge Time Too Short	3 ranked fixes
P0D5E	Battery Charger Hybrid/EV System Discharge Time Too Long	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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