Code Definition

B0070 (1C) — RHF seat belt pretensioner squib diagnostic circuit voltage 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.

When B0070 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 an abnormal voltage condition in the Right Hand Front (RHF) seat belt pretensioner squib diagnostic circuit. The ACM applies a small diagnostic voltage across the squib loop to confirm circuit health, and this fault stores when that monitored voltage sits outside the expected window, pointing to a supply, ground, or circuit integrity problem rather than a simple open or short. Because the diagnostic circuit is how the ACM confirms the pretensioner can fire, an out of range voltage here means the module can no longe...

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