Code Definition

B1149 — Front Airbag Sensor LH Circuit Malfunction

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

About B1149

B1149 is a manufacturer-specific body diagnostic trouble code recorded for Toyota vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1149 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

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.

B1149 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 Supplemental Restraint System (SRS) Control Module continuously monitors the left hand front impact sensor circuit for correct voltage and resistance during its self test at key on and during continuous collision readiness checks. The LH front impact sensor is a dedicated acceleration or crash sensor mounted in the left front crumple zone area, communicating with the SRS module via a dedicated two wire loop. DTC B1149 is logged when the module detects an open circuit, a short to ground or battery, or resistance outside the expected range (typically below approximately 2 ohms or above appro...

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