Code Definition

B1235 — Window Feedback Failure

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

About B1235

B1235 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.

B1235 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

Modern power window systems use a feedback signal from the window motor to the door module so the module can count the motor's rotations and track window position. This feedback may come from a hall effect ripple counter built into the motor, a dedicated position sensor, or by monitoring the motor current waveform ripples, depending on the manufacturer. DTC B1235 sets when the door module does not receive the expected feedback pulses or position data while the motor is being commanded to run, indicating a failure in the motor sensor, wiring, or module input circuit. With this code stored, feat...

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