Meaning and Explanation of Error Code B0016
B0016 – Driver’s Airbag Deployment Circuit (Stage 2), Low Voltage
This code indicates that the driver’s airbag secondary deployment circuit has detected a voltage level below the permitted threshold. Modern airbags can have two-stage deployment: the first stage provides instant inflation, and the second stage provides supplementary support. Low voltage may indicate a wiring harness issue, poor contact, SRS module failure, or damage to the airbag itself.
What is Error Code B0016?
Error code B0016 refers to the passive safety system of the vehicle, specifically the driver’s airbag secondary deployment circuit. It indicates that the voltage in this circuit is too low, which can affect the effectiveness of the airbag in the event of an accident.
The error may be caused by poor connections, a faulty Passenger Safety System (SRS) controller, damaged wiring, or issues with the airbag itself. The B0016 code can appear intermittently or permanently, depending on the nature of the fault.
From a safety perspective, B0016 is a serious error. If present, the operation of the driver’s airbag may be compromised, significantly increasing the risk of injury in an accident.
Symptoms of Error Code B0016 (How Do I Know If There’s a Problem?)
- SRS or airbag indicator light on the dashboard
- Error persists and reappears after clearing
- No airbag deployment during system test operation
- Other safety-related codes may appear
Main Causes of Error Code B0016
- Loose or damaged airbag connectors
- Failure of the secondary stage pyrotechnic charge
- Corrosion or break in the SRS circuit wiring harness
- Faulty Airbag Control Unit (SRS)
- Improper installation after steering wheel or airbag replacement
Error Code B0016 in Common Vehicle Models
- B0016 in Chevrolet Cruze: The error is often due to a defective connector under the steering wheel, especially after tampering with the steering column.
- B0016 in Ford Focus: This typically applies to low-quality components inside the steering wheel; the SRS module may also be at fault.
- B0016 in Honda Accord: This can occur after an accident or installation of a non-original airbag. Pyrotechnic component testing is required.
- B0016 in Toyota Camry: The system error is often related to a short circuit in the wiring under the seat or issues with the steering module.
- B0016 in Volkswagen Passat: The cause may be electrical interference or a software fault in the safety module.
How to Diagnose Error Code B0016?
- Use an OBD2 scanner to read the error codes.
- Ensure the battery is fully charged and there is no power surge.
- Check the integrity and connections of the airbag wiring harness.
- Inspect the connectors and contacts of the airbag and SRS module.
- Reset the code to see if it reappears.
Possible Causes and Diagnostic Methods
Possible Cause | How to Check? |
|---|---|
Damaged airbag connectors | Check and test the circuit with a multimeter |
Damaged wiring | Visual inspection and resistance testing |
Faulty SRS module | Scanner diagnostics, power and signal checks |
Repair errors (e.g., steering wheel installation) | Compare with technical installation guidelines |
Required Tools: OBD2 scanner, multimeter, vehicle-specific technical manual, dielectric grease (for cleaning contacts)
How to Fix Error Code B0016? (Problem Solutions)
Simple Fixes
- Disconnect and reconnect the SRS connectors (after disconnecting the battery).
- Clean oxides and dirt from contact points.
- Check fuses related to the SRS system.
In-Depth Diagnostic and Repair Solutions
- Replace the damaged wiring harness.
- Replace the pyrotechnic component or the entire driver’s airbag.
- Verify and, if necessary, replace the SRS control module.
- Flash the module in case of software faults.
Addressing Issues by Symptom
Symptom | Possible Solution |
|---|---|
SRS indicator is steady | Check wiring and control module |
Code returns after clearing | Replace the airbag or repair the circuit |
No response during system test | Diagnose SRS module and power circuits |
FAQ for B0016
What should I do if I come across error code B0016?
Code B0016 indicates a problem with the driver’s airbag secondary circuit. This is a serious error that requires immediate diagnosis and resolution.Can I drive with error code B0016?
No, as the error suggests a potential malfunction of the driver’s airbag, which is critical for your safety.What happens if I ignore the B0016 code?
Ignoring the error may result in the driver’s airbag failing to deploy or deploying incorrectly in an accident.Can I reset the B0016 code myself?
You can attempt to reset the code with an OBD2 scanner or by disconnecting the battery, but if the underlying issue is not fixed, the code will reappear.Do I need to replace the airbag for error B0016?
Not always. Sometimes it’s enough to fix wiring issues or replace the SRS module, but in other cases, the airbag itself may need replacement.Can error B0016 appear after replacing the steering wheel?
Yes, if the wiring harness is incorrectly connected during steering wheel replacement or if the airbag wiring contacts are broken.
Related OBD2 Error Codes for B0016
- B0010 – Driver’s Airbag Deployment Circuit (Stage 1), Low Voltage
- B0020 – Passenger Airbag Deployment Circuit (Stage 1), Low Voltage
- B0040 – Side Airbag Contact Circuit Violation
Important! The SRS system continuously monitors for faults. If you see the B0016 code, it means the system has detected a recurring violation. Ignoring it may result in the airbag failing to deploy or deploying incorrectly in an accident. Exercise caution and follow all manufacturer’s instructions when working with airbags.