B0046 – Right Front Side Impact Sensor Circuit Open
DTC B0046 indicates that the Airbag Control Module (ACM) has detected an open circuit condition in the right front side impact sensor circuit. This sensor is part of the Supplemental Restraint System (SRS) and provides collision information required for proper airbag operation.
An open circuit means the electrical path between the sensor and the SRS module is interrupted, preventing normal communication.
Code Information
- DTC: B0046
- System: Supplemental Restraint System (SRS)
- Description: Right Front Side Impact Sensor Circuit Open
- Severity: High (Safety Related)
Symptoms
- Airbag warning light ON.
- SRS warning message displayed.
- Right-side airbags may be disabled.
- B0046 stored in the Airbag Control Module.
Possible Causes
- Broken wire in the sensor harness.
- Loose or disconnected connector.
- Corroded terminals.
- Damaged right front impact sensor.
- Previous collision damage.
- SRS module fault (rare).
Typical Wiring Diagram
Diagnostic Procedure
- Confirm B0046 using an SRS-capable scan tool.
- Follow safety procedures and disconnect the battery if required.
- Inspect the right front impact sensor connector.
- Check wiring for cuts, breaks, or damage.
- Test circuit continuity between sensor and Airbag ECU.
- Repair the open circuit or replace faulty components.
- Clear the code and verify system operation.
Important Note
Wire colors, connector pinouts, sensor locations, and electrical specifications vary between vehicle manufacturers and models. Always use factory service information before testing SRS circuits.
Can You Drive With B0046?
The vehicle may operate normally, but the SRS system may not provide full protection during a collision. This fault should be repaired as soon as possible.
Estimated Repair Cost
- Connector repair: $20–80
- Wiring repair: $40–150
- Impact sensor replacement: $80–300
- SRS module repair/replacement: $300–900
Related DTCs
Frequently Asked Questions
What causes B0046?
Most common causes are broken wiring, damaged connectors, or a faulty impact sensor.
Can I clear B0046 with a scanner?
The code can be cleared, but it will return if the open circuit problem remains.
Is B0046 dangerous?
Yes. It affects the SRS safety system and should be repaired correctly.
OBDSpark Technician Tip: Never use a test light or external voltage on airbag circuits. Always follow manufacturer safety procedures when servicing SRS components.