Fault Family System: Powertrain (P-Codes) 6 SAE Codes

Battery Monitor Module Performance

Diagnostic & Technical Explanation

Code P058A (Battery Monitor Module Performance) sets when the intelligent battery sensor/monitor module cannot accurately calculate state of charge, current flow, or temperature, or its internal temperature exceeds its operating range. Causes are a poor connection at the battery negative terminal where the sensor clamps, internal sensor degradation, or excessive heat exposure in the battery compartment.

These 6 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 6 times.

Codes in this family (6)

Code	Definition	Repair coverage
P058A	Battery Monitor Module Performance	3 ranked fixes
P058B	Battery Monitor Module Current Monitoring Performance	3 ranked fixes
P058C	Battery Monitor Module Temperature Monitoring Performance	3 ranked fixes
P058D	Battery Monitor Module Voltage Monitoring Performance	3 ranked fixes
P058E	Battery Monitor Module Temperature Too High	3 ranked fixes
P058F	Battery Monitor Module Temperature Too Low	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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