Definition of check engine code B0019


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Modern vehicles are equipped with advanced diagnostic systems that monitor various components to ensure optimal performance and safety. One common scenario drivers face is the illumination of the check engine light. Among the various potential trouble codes, check engine code B0019 stands out. In this comprehensive guide, we’ll delve into the definition, symptoms, possible triggers, and remedies associated with B0019. By the end, you’ll be equipped with the knowledge to address this issue and keep your vehicle running smoothly.

Definition of check engine code B0019

Check engine code B0019 is a diagnostic trouble code (DTC) that pertains to a fault within the driver’s seatbelt tension sensor circuit. This sensor is a critical component of the vehicle’s safety system, responsible for detecting seatbelt tension and relaying this information to the vehicle’s onboard computer. When the system detects irregularities in this circuit, it triggers the check engine light to illuminate and stores the B0019 code.

B Body Code
Problem is antilock brake system, electronic suspension and steering systems.
0 SAE - Generic
0 Accelerator Pedal Position (APP) Sensor 1 Performance
1 BBV Sensor Circuit Low Voltage
9 Transmission


RF/Passenger frontal impact deployment loop short to battery.

Symptoms of Check Engine Code B0019

Vehicles experiencing issues related to check engine code B0019 may exhibit a range of symptoms that drivers should be vigilant about. Some common signs include:

  • Illuminated Airbag Light: A prominent indicator of a seatbelt tension sensor problem is the illumination of the airbag or supplemental restraint system (SRS) light on the dashboard.
  • Audible Warnings: Some vehicles might emit warning chimes or alerts when the seatbelt tension sensor circuit malfunctions.
  • Inoperative Airbags: In the event of a collision or impact, the airbags might not deploy as intended due to the compromised sensor circuit.
  • Diagnostic Trouble Codes: Apart from B0019, related trouble codes may also appear, indicating a broader issue within the vehicle’s safety systems.

Possible Triggers of B0019

Understanding the potential causes of check engine code B0019 is crucial for effective diagnosis and resolution. Here are some common triggers:

  • Damaged Wiring: Frayed or broken wires in the seatbelt tension sensor circuit can disrupt the signal transmission, leading to the code’s activation.
  • Faulty Sensor: A malfunctioning seatbelt tension sensor itself can cause inaccurate readings and trigger the B0019 code.
  • Connector Issues: Loose or corroded connectors within the sensor circuit can hinder proper communication and trigger the code.
  • Accidents or Impacts: Previous accidents or collisions that affected the seatbelt tension sensor or its surroundings can contribute to the code’s activation.

Solutions for B0019: Addressing the Issue

When faced with check engine code B0019, taking appropriate actions can help restore your vehicle’s safety system. Here’s what you can do:

  1. Perform Visual Inspection: Begin by visually inspecting the wiring, connectors, and sensor components for any visible damage or anomalies. Address any issues found.
  2. Clear Codes: Sometimes, the code may trigger due to a temporary glitch. Using an OBD-II scanner, clear the code and observe if it reoccurs.
  3. Check Connectors: Ensure all connectors related to the seatbelt tension sensor are securely fastened and free from corrosion. Clean or replace connectors if necessary.
  4. Sensor Replacement: If the sensor itself is faulty, replacing it with an OEM or high-quality aftermarket sensor is advisable. Follow manufacturer guidelines.
  5. Wiring Repair: In cases of damaged wiring, repair or replace the affected wires carefully, making sure they’re properly insulated and secured.
  6. Professional Diagnosis: If the issue persists, seeking assistance from a professional mechanic with experience in automotive electronics is recommended.


Understanding check engine code B0019 is crucial for maintaining your vehicle’s safety and performance. By recognizing the symptoms, potential triggers, and solutions associated with this code, you’re better equipped to address the issue promptly. Remember that safety systems play a vital role in protecting you and your passengers, making the resolution of B0019 a priority. If you encounter challenges or are unsure about the diagnosis and repair, don’t hesitate to seek the expertise of qualified professionals.


Can I continue driving with the check engine light illuminated due to code B0019

Definition of check engine code B0019

While your vehicle might still be drivable, it’s essential to address the underlying issue promptly to ensure the proper functioning of the safety system in the event of an accident.

Can a DIY enthusiast diagnose and fix B0019?

Diagnosing and addressing B0019 might require specialized tools and knowledge. While some basic checks can be performed, seeking professional help is recommended for accurate diagnosis and resolution.

Can a disconnected seatbelt trigger code B0019?

Yes, a disconnected or improperly fastened seatbelt can trigger the B0019 code since the sensor interprets it as a fault in the tension system.

How much does it cost to fix B0019?

The cost varies depending on factors like the cause of the issue, the need for replacement parts, and labor costs. Repairing wiring might be less expensive than replacing a faulty sensor.

Can I reset the airbag light after fixing B0019?

Yes, using an OBD-II scanner, you can reset the airbag light once the B0019 issue is resolved. However, make sure the root cause is addressed to prevent the light from reappearing.

Is B0019 a common issue across all vehicle makes and models?

B0019 is specific to vehicles equipped with seatbelt tension sensors. While it might not be universal, it can occur in various makes and models that employ this safety feature.

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