Code B1145 is a manufacturer-specific code related to the SRS system. In GM vehicles, it indicates a short circuit of the driver/passenger seat belt pretensioner circuit to voltage; in Toyota vehicles, it indicates a fault in the door side airbag sensor (left side).
OBD-II (EN): Driver/Passenger Seat Belt Pretensioner Circuit Short to Voltage
Code B1145 signals a fault in the SRS safety system – depending on the vehicle make, it may indicate a short circuit in the seat belt pretensioner circuit (GM) or a failure of the side airbag sensor (Toyota). This is a critical fault as it directly affects the operation of passenger protection systems during a collision. Due to its complex nature and safety risks, diagnosis and repair should only be carried out by an authorized service center.
SRS (airbag) warning light illuminated on the dashboard. Possible deactivation of the airbag or seat belt pretensioner system. Airbags or pretensioners may not deploy in a collision. The safety system may operate incorrectly or be completely blocked.
• (GM) Short circuit of the driver or passenger seat belt pretensioner circuit to the power supply line (+12V) • (Toyota) Faulty or defective left side airbag sensor in the left door • Damaged wiring harness or electrical connector near the door or B-pillar • Corrosion or moisture in the SRS sensor connector • Faulty SRS control module (Airbag ECU)
Usterka obwodu zespołu czujnika bocznej poduszki powietrznej (prawa strona) – awaria układu SRS. Jednostka diagnostyczna poduszek powietrznych wykryła nieprawidłowość w obwodzie czujnika bocznego po stronie prawej.
System poduszek powietrznych — usterka ogólna
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Based on the systems affected by this code, we will most likely start with:
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.