Code Definition

B1298 — Power Supply Sensor Circuit Short To Battery

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

About B1298

B1298 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1298 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; and a sensor-related fault — the reported value from the named sensor is out of spec.

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.

B1298 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) monitors a power supply sensor circuit that reports the voltage at a key power feed, typically the main battery voltage rail or a downstream switched supply, so the module can make decisions about charging, load shedding, and accessory enable timing. DTC B1298 sets when the BCM detects the sense voltage on this input has risen above the upper plausibility threshold, indicating the signal wire is shorted to a battery feed or another high voltage source rather than reading the intended sense point. The sense input is normally a high impedance analogue pin protected ...

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