Code Definition

B1317 — Battery Voltage High

System: Body  |  Type: Manufacturer-Specific  |  Make: Ford

About B1317

B1317 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1317 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1317 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Body Control Module (BCM) and other vehicle control modules monitor their B+ supply voltage to confirm the charging system is operating within normal limits, typically between 13.5 and 14.7 volts at idle and slightly higher under heavy load with cold ambient conditions. DTC B1317 is set when the controlling module detects sustained battery voltage above the upper limit defined by the manufacturer, usually around 16 volts or higher for an extended period of time. The fault generally points to an overcharging condition where the alternator output is not being regulated correctly, either due ...

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