U0455 indicates that a module receiving data from the Occupant Classification System (OCS) module has detected invalid or missing information. This usually points to a problem with the OCS module itself, its wiring, or the power/ground supply that prevents proper communication with the airbag control module.
The OCS module may have internal failure, causing it to send corrupt or no data to the receiving module.
Corrosion, chafed wires, or loose pins can interrupt the signal, resulting in invalid data reception.
If the module does not receive proper voltage or ground, its output can be erratic or absent, triggering the code.
Less commonly, the receiving module may have a communication circuit issue that misinterprets valid data as invalid.
Occasionally, outdated or corrupted firmware in the OCS or ACM can cause false invalid data flags.
The powertrain control module is seldom the cause; replacement is only considered after all other possibilities are ruled out.
No. The PCM is rarely at fault for this code; the issue is almost always with the OCS module, its wiring, or power/ground. Replacing the PCM should only be considered after those components have been verified as good.
Indirectly, if the seat belt sensor is part of the OCS wiring harness and its fault disrupts communication, it could contribute, but the primary focus remains the OCS module and its circuit.
Clearing the code only turns off the warning light; if the underlying fault remains, the code will return once the module detects invalid data again.
The airbag system may not correctly classify the occupant, which can affect airbag deployment. It is advisable to have the system inspected and repaired before relying on the airbags in a crash.