B0067 is a Body Diagnostic Trouble Code (DTC) that points to an abnormal high-level signal or plausibility issue in an occupant restraint-related circuit. Under SAE J2012-DA conventions this is a system-level descriptor, not a guaranteed failed part or precise location. Interpretation commonly varies by make, model, and year, so you should confirm the fault with basic electrical and network testing rather than replacing parts. Expect to measure signal voltage, reference continuity, power and ground integrity, and verify message plausibility on the vehicle network before concluding the root cause.
What Does B0067 Mean?
Per SAE J2012 formatting, B0067 denotes a body-system fault tied to an occupant restraint circuit showing an unexpected high signal or out-of-range high plausibility reading. This article follows SAE J2012 formatting and references the SAE J2012-DA digital annex for standardized DTC descriptions; many body codes do not map to a single universal component across all manufacturers.
The code is shown here without a hyphen suffix (Failure Type Byte, FTB). An FTB, when present, refines the base code into a subtype (for example intermittent, stuck high, short-to-rail, or analog range). Because B0067’s exact affected component can vary by vehicle, confirm the failure with voltage, resistance, signal waveform, and network plausibility tests before concluding which sensor, loop, connector, or module is responsible.
Quick Reference
- System: Occupant restraint circuit high-level/plausibility fault (body network class)
- Typical focus: measure power, ground, reference, and signal integrity
- Safety: restraint systems may be inhibited or set to a limp state until cleared and verified
- First test: scan tool data, freeze frame / Mode 06, and live voltage readings at the suspected circuit
- Note: interpretation and affected wiring/sensors vary by make/model/year
Real-World Example / Field Notes
In the shop you’ll often see B0067 set after a collision repair or when connectors near the dash have been disturbed. Technicians commonly associated this code with loose connector pins, corroded contacts, and splices in harnesses that feed occupant restraint sensors or squib loops. One possible cause encountered was a damaged seat-belt buckle harness rubbing against a sharp bracket, producing intermittent high-level spikes that looked like a plausibility fault on the restraint module.
Another frequent situation is aftermarket audio or alarm installs that share power or ground circuits with restraint system wiring; backfed voltages or poor grounds can elevate a signal above its expected reference. In many cases the scan tool showed a related network message flagged as implausible before the body module logged B0067. Always verify with a digital multimeter and, when needed, an oscilloscope to observe waveform shape and transient spikes rather than relying solely on stored DTC text.
B0067 is recorded as a body-class Diagnostic Trouble Code tied to the Supplemental Restraint System (SRS) circuitry. SAE J2012 defines the DTC structure and some standardized descriptions; many B‑codes do not map to a single universal component and interpretation varies by make, model, and year. Confirm what B0067 means on a specific vehicle with basic electrical and network testing (power/ground/reference, continuity, and message integrity on the Controller Area Network (CAN)) before replacing parts.
Symptoms of B0067
- SRS warning lamp Illuminated or flashing on key-on or during driving.
- Airbag/pretensioner inhibited Safety restraints may be disabled or show degraded readiness.
- Intermittent warning Lamp comes and goes with vehicle vibration or door/seat movement.
- Stored freeze-frame Snapshot data showing voltage or time-stamped events near when fault set.
- Multiple related faults A related fault or communication anomaly appears in scan data.
- Unexpected deployment logic System reports plausibility or sensor-signal faults during self-test.
Common Causes of B0067
Most Common Causes
Loss or corruption of the SRS circuit signal is commonly associated with B0067. Typical root causes include poor power or ground at the restraint control module, intermittent or open wiring, corroded connectors, or poor sensor reference signals. These causes are vehicle-specific; confirm by measuring supply voltage, ground resistance, and signal continuity before assuming a failed sensor or module.
Less Common Causes
Less commonly, B0067 can result from intermittent CAN messaging, internal processing or input-stage issues in a control module after external tests pass, or rare harness damage after a collision. Firmware/configuration mismatches or previous improper repairs can also produce this DTC, but these are diagnosed only after thorough external input verification.
Diagnosis: Step-by-Step Guide
Tools: diagnostic scan tool with live data and Mode 06, digital multimeter, oscilloscope, wiring diagrams, back-probing probes or T‑pins, connector cleaner/contact spray, insulated jumper wires, service manual or repair information.
- Connect the scan tool, read freeze‑frame and any pending status; record time, battery voltage, and related PIDs to establish baseline data.
- Verify battery voltage at key-on and cranking; low system voltage can create false SRS faults—measure at fuse or module supply pin for accuracy.
- Inspect visible connectors and harnesses for corrosion, bent pins, or signs of repair; wiggle while watching live data for changes to reproduce intermittent behavior.
- Backprobe the module power and ground pins; measure voltage and ground resistance under load. Good ground is typically low milliohms—high readings indicate poor connection.
- Check continuity between module and commonly associated sensors or squib circuits per wiring diagram; measure resistance and look for opens/shorts using multimeter.
- Use an oscilloscope to observe sensor signal integrity and reference waveform where applicable; compare amplitude and timing to known-good patterns or specs when available.
- Monitor Controller Area Network (CAN) traffic while fault is present; verify the SRS module transmits and receives expected messages and that bus voltages remain within expected idle levels.
- If external wiring, power, ground, and network appear good, perform input-stage plausibility checks and consult Mode 06 data for sensor ranges to identify plausibility failures.
- Isolate suspected harness sections with temporary repairs or known-good connectors to confirm fault clears before ordering replacement parts.
- Clear the code and perform a drive or self-test cycle to confirm repair; if the code returns, repeat targeted measurements focusing on the failing measurement domain.
Professional tip: Always verify wiring and power/ground integrity first—most SRS B‑codes resolve with connector repair, cleaning, or securing poor grounds. Replace modules only after all external inputs and network messages test good and the fault cannot be reproduced by recreating measured failures.
Possible Fixes & Repair Costs
Low-cost repairs typically address accessible wiring, connectors, or sensor harness issues discovered by basic voltage, continuity, and resistance checks. Low: $75–$200 — justified when tests show corroded terminals, intermittent connector continuity, or a damaged pigtail that can be cleaned or replaced. Typical repairs cover sensor replacement or targeted harness repair after failed signal plausibility or open/short confirmation. Typical: $250–$700 — justified when bench testing or in-situ measurements identify a single sensor with out-of-spec voltage or resistance. High-cost outcomes involve seatbelt buckle modules, airbag impact sensors, or control module work where wiring tests and power/ground checks pass and the module shows possible internal processing or input-stage issue. High: $900–$2,500+ — justified only after all external wiring, power, ground, and signal tests pass and the control module still reports the fault. Labor, OEM parts, and required dealer-level diagnostics increase cost. Factors affecting price: accessibility of the component, number of affected circuits, whether module replacement is required, and regional labor rates. Always base the repair on measured faults — e.g., a continuity failure on the passenger buckle circuit justifies replacing the harness connector; a stable but out-of-range sensor voltage justifies replacing that sensor.
Can I Still Drive With B0067?
You can often drive short distances with B0067 present, but treat it as a safety-related warning in the occupant restraint system. The vehicle may disable airbag deployment logic for the affected channel, or the supplemental restraint system may enter a degraded mode depending on the vehicle. Prioritize safe transport to a repair facility and avoid long trips or risky driving until proper diagnosis confirms the system’s readiness. Use measured data — stored freeze-frame, Mode $06, and live voltage/signal readings — to judge whether the fault is intermittent or persistent before deciding to drive.
What Happens If You Ignore B0067?
Ignoring B0067 can leave an occupant restraint channel unverified and potentially unavailable in a crash. The system may disable deployment for the affected circuit, reducing protection, and you risk failing a safety inspection. Intermittent issues can also escalate to more circuits if wiring faults worsen.
Related Codes
- B0019 – Occupant Restraint Airbag Circuit Fault
- B0018 – Body Circuit Fault — Restraint Sensor Signal
- B0017 – Body Circuit Signal Integrity Fault
- B0016 – Occupant Sensing Circuit Fault (SRS)
- B0014 – Occupant Restraint Circuit Fault
- B0011 – Occupant Restraint Circuit Fault
- B0009 – Restraint System Circuit Fault
- B0008 – Supplemental Restraint System Circuit High
- B0007 – Supplemental Restraint System Circuit Fault
- B0006 – Restraint Deployment Commanded Too Long
Key Takeaways
B0067 is a body-class fault related to occupant restraint circuit signal plausibility or integrity and may vary by make/model/year. Always follow SAE J2012-DA structure for DTC interpretation and remember vehicle-specific definitions can differ. Test-driven diagnosis is required: start with power/ground checks, then continuity and signal measurements, then module input validation. Replace parts only when measurements or confirmed failures justify the repair. Module replacement is a last resort after all external inputs test good.
Vehicles Commonly Affected by B0067
B0067 is commonly seen or often reported on vehicles from manufacturers with complex multi-stage airbag and seatbelt buckle sensor architectures, such as Toyota and Ford. These platforms frequently use several occupant-sensing and buckle detection circuits, increasing the number of related diagnostic paths. That said, the code may appear on many brands — interpretation depends on the vehicle’s restraint system design and should be confirmed with basic electrical and network testing.
FAQ
Can I clear B0067 and drive like nothing happened?
You can clear the code, but clearing alone does not repair the underlying fault and the code will likely return if the issue persists. Clearing is useful to confirm whether a fault was transient. Use it only after you’ve captured live data and freeze-frame information. If the code returns, proceed with step-by-step electrical tests (power/ground, continuity, signal integrity) to locate the fault before trusting system readiness.
Is B0067 a safety-critical fault?
Yes. B0067 involves occupant restraint circuitry and thus affects airbag/belt system readiness, making it safety-critical. Even if the vehicle appears to drive normally, the affected restraint channel may be disabled or unreliable. Treat the code as a priority for diagnosis and use measured evidence — failed voltage levels, open circuits, or implausible sensor signals — to assess the severity and required repair.
Can a weak battery or poor ground cause B0067?
Yes. Low system voltage or high-resistance grounds can create false plausibility failures for restraint sensors. Start by measuring battery voltage at rest and with accessories, and check dedicated module and sensor grounds for low resistance to chassis. If power/ground measurements are out of specification or show intermittent behavior, those findings justify repairing battery connections or grounds before replacing sensors or modules.
How long will a proper diagnosis take?
Diagnosis time varies but typically requires one to three hours for a trained technician with proper tools. Quick cases (cleaned connector, obvious open harness) can be under an hour. Complex cases involving intermittent wiring or module-level ambiguity require longer: capturing live data, wiggle tests, and bench testing sensors. Time estimates should be based on preliminary test results and whether additional parts or dealer-level diagnostics are needed.
Will replacing a sensor fix B0067?
Only if tests identify that sensor as the failed component. Replace a sensor when bench or in-vehicle measurements show out-of-spec resistance, voltage, or signal behavior that matches the fault. If wiring, connectors, power, or ground are bad, sensor replacement alone will not fix the code. Confirm replacement is justified by the failing measurement before ordering parts to avoid unnecessary costs.