Code Definition

B181A (87) — Fault in Response from Steering Lock Request

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

About B181A

B181A is a manufacturer-specific body diagnostic trouble code recorded for Peugeot 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.

B181A 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 Built in Systems Interface (BSI) commands the Electronic Steering Column Lock (ESCL) to engage when the vehicle is shut down and to release when a valid key is detected and start is authorised. The ESCL contains a small motor that drives a locking bolt into a notch on the steering shaft, plus position microswitches that report locked and unlocked status back to the BSI over a dedicated CAN or LIN sub network. DTC B181A with subcode 87 indicates the BSI sent a lock or unlock request to the ESCL but did not receive a valid response message within the expected time window, which the BSI inter...

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

Quick Facts