Fault Family System: Powertrain (P-Codes) 12 SAE Codes

Battery Charger Module Voltage Performance

Diagnostic & Technical Explanation

Code P2E2C (Battery Charger A Module Supply Voltage Performance) covers the onboard charger's own internal module supply-voltage checks and the forced-shutdown voltage threshold that trips the charger off before its low-voltage electronics are damaged, on either the A or B charger module. The ECM flags a performance deviation or a voltage reading too low or too high. Causes are a degraded low-voltage supply regulator inside the charger, a corroded 12V feed connector to the charger module, or a weak vehicle 12V battery unable to hold the charger's control electronics up during a session.

These 12 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 12 times.

Codes in this family (12)

Code	Definition	Repair coverage
P2E2C	Battery Charger A Module Supply Voltage Performance	3 ranked fixes
P2E2D	Battery Charger A Module Supply Voltage Low	3 ranked fixes
P2E2E	Battery Charger A Module Supply Voltage High	3 ranked fixes
P2E2F	Battery Charger B Module Supply Voltage Performance	3 ranked fixes
P2E30	Battery Charger B Module Supply Voltage Low	3 ranked fixes
P2E31	Battery Charger B Module Supply Voltage High	3 ranked fixes
P2E32	Battery Charger A Module Forced Shutdown Voltage Performance	3 ranked fixes
P2E33	Battery Charger A Module Forced Shutdown Voltage Low	3 ranked fixes
P2E34	Battery Charger A Module Forced Shutdown Voltage High	3 ranked fixes
P2E3E	Battery Charger B Module Forced Shutdown Voltage Performance	3 ranked fixes
P2E3F	Battery Charger B Module Forced Shutdown Voltage Low	3 ranked fixes
P2E40	Battery Charger B Module Forced Shutdown Voltage 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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