System voltage low

What the code means

A control module measured supply voltage below its calibrated limit.

Severity and driving

Urgent if stalling, steering, brake, or multiple system warnings occur

Plausible causes

Discharged/failed battery
Charging-system fault
Loose/corroded connection
High electrical load or wiring fault

Next checks

Note whether it occurs during cranking or driving
Inspect visible battery terminals with vehicle off
Professional battery and charging test

Source and boundary

Code structure follows SAE J2012. Manufacturer-specific definitions, pinpoint tests, wiring, torque, fluids, and repair procedures require authoritative information for the exact vehicle.

SAE J2012 Diagnostic Trouble Code DefinitionsReviewed 2026-08-13

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