Code Definition

B1236 — Window Feedback Loss of Signal

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

About B1236

B1236 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.

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.

B1236 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

Power window systems rely on a continuous feedback signal from the window motor to allow the door module to track window position and enable advanced functions. DTC B1236 sets specifically when the feedback signal is completely absent during commanded motor operation, indicating a total loss rather than an intermittent or out of range fault. The most common triggers are a fully broken conductor in the feedback circuit or a completely failed hall effect sensor inside the motor. With this code stored, auto up, auto down, and anti pinch features are disabled, and the door module will not allow th...

Join TaT to view the complete code information and diagnostic details.

Quick Facts