Code Definition

B1097 — Temperature Flap Motor Position Sensor Circuit Short to Battery

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

About B1097

B1097 is a manufacturer-specific body diagnostic trouble code recorded for Volkswagen vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1097 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.

B1097 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 automatic HVAC control module, control unit address 08, sets DTC B1097 when it commands the temperature flap, or blend door, actuator to reposition but reads the internal potentiometer feedback voltage stuck at or near battery supply, which indicates a short to positive or an open circuit. The fault is confirmed when this condition is present for longer than the module diagnostic timeout, with the ignition on and system voltage within the normal 9 to 16 volt range. The temperature flap actuator uses a small DC motor with a position potentiometer that reports flap angle back to the HVAC mod...

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