Code Definition

B0070 (55) — RHF seat belt pretensioner structural malfunction

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B0070

B0070 is a generic (obd-ii standard) 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.

Because B0070 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

In this application DTC B0070 sets when the Airbag Control Module (ACM) detects a mechanical or structural malfunction of the Right Hand Front (RHF) seat belt pretensioner, as distinct from a simple wiring fault. This structural code typically indicates the pretensioner has already been deployed, is physically damaged, or has an internal mechanical defect that stops the retractor and buckle mechanism working as designed. Because the pretensioner must physically pull the belt tight and lock it at the instant of a collision, a structural fault means it cannot perform that job even if its firing ...

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