This code indicates that the primary control module (typically the Restraints Control Module or PCM) has received corrupted, implausible, or out-of-range data from a specific occupant restraint sensor designated "H" via the CAN bus network. The sensor may be a side-impact sensor, seat position sensor, or seatbelt tension sensor depending on the vehicle configuration. This invalid data prevents the restraint system from verifying proper sensor operation and may disable associated safety components.
Internal electronics fault within the specific sensor causing it to transmit garbled, out-of-range, or checksum-failed data packets onto the network.
Corrosion, bent pins, moisture intrusion, or intermittent opens in the sensor's power, ground, or CAN bus circuits causing signal degradation or voltage drop.
Damaged network wiring, improper termination resistors, short-to-ground, or electromagnetic interference disrupting high-speed communication between Sensor H and the receiving module.
Internal fault within the airbag control module causing it to misinterpret valid sensor data or fail to properly validate incoming network messages.
Rare scenario where the PCM incorrectly flags valid data as invalid due to internal processing errors or corrupted calibration; only plausible after all sensor and wiring tests pass.
The vehicle will typically operate normally, but the specific airbag, pretensioner, or occupant classification system monitored by Sensor H may be disabled and will not deploy in a collision. It is advisable to have the system repaired promptly.
Almost never. This code almost always points to the sensor itself, its wiring, or the Restraints Control Module. PCM replacement is extremely unlikely and should only be considered after exhaustive testing confirms the PCM is corrupting the data.
The physical location varies by manufacturer and vehicle design; it may be a side impact sensor on the B-pillar, a seat track position sensor, or a seatbelt buckle switch. Consult the vehicle-specific service information for the exact schematic.
No. If the code set once, the underlying fault likely exists. The restraint system performs self-tests at startup, and intermittent faults will recur. Clearing the code without repair leaves safety systems potentially non-functional.