Code Definition

B1297 — Power Supply Sensor Circuit Open

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

About B1297

B1297 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 B1297 is stored, the module has detected an open (broken or disconnected) electrical path 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.

B1297 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 that the module relies on for stable operation. DTC B1297 sets when the BCM detects an open in this sense circuit, meaning the expected voltage signal is missing or stuck at a value that indicates a broken connection between the sense point and the module input. The sensor circuit usually consists of a voltage divider or buffered analogue input that the BCM samples continuously to make decisions about load she...

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