Code Definition

B2226 — Front Crash Sensor Internal Fault

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

About B2226

B2226 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 B2226 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.

Because B2226 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

The Supplemental Restraint System (SRS) control module continuously monitors the internal self test and integrity status of the front crash sensors that report frontal collision data. DTC B2226 sets when a front crash sensor reports a failed internal self test, an internal accelerometer fault, an internal memory error, or a watchdog timeout during the periodic monitoring sequence. Front crash sensors contain a digital accelerometer, signal conditioning, and an internal microprocessor that constantly checks itself for hardware and firmware integrity, then reports its status to the SRS module ov...

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