Code Definition

B1131 (08-0A) — Wiper Motor Module Supply/Communication Fault

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

About B1131

B1131 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. 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.

B1131 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 Wiper Motor Control Module monitors its supply voltage, ground integrity, and communication with the Body Control Module (BCM) during park, intermittent, and wash wipe cycles. This module drives the wiper motor, reports park position back to the BCM, and responds to stalk and rain sensor commands received over the network. DTC B1131 with this subtype is set when the module detects one or more of the following for longer than the prescribed threshold: supply voltage outside the expected range (typically below approximately 9V or above approximately 16V), loss of CAN or LIN communication wit...

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