B0066 GMC Code - Left Front/Driver Pretensioner Deployment Loop Voltage Out of Range
Quick Answer
The driver seat belt pretensioner deployment loop consists of a seat belt pretensioner - LF and the seat belt pretensioner - LF high and low circuits. Common causes include Faulty Left Front/Driver Pretensioner, Left Front/Driver Pretensioner harness is open or shorted, Left Front/Driver Pretensioner circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B0066 GMC indicates Left Front/Driver Pretensioner Deployment Loop Voltage Out of Range.
- Common causes
- Common causes include Faulty Left Front/Driver Pretensioner, Left Front/Driver Pretensioner harness is open or shorted, Left Front/Driver Pretensioner circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B0066 GMC Description
What are the Possible Causes of the DTC B0066 GMC?
- Faulty Left Front/Driver Pretensioner
- Left Front/Driver Pretensioner harness is open or shorted
- Left Front/Driver Pretensioner circuit poor electrical connection
- Faulty Sensing and Diagnostic Module (SDM)
How to Fix the DTC B0066 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B0066 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about B0066 GMC Code
1. What are the common symptoms of OBDII code B0066 GMC?
The common symptoms of OBDII code B0066 GMC include the airbag warning light illuminating on the dashboard and a diagnostic trouble code indicating "Left Front/Driver Pretensioner Deployment Loop Voltage Out of Range."
2. What could cause the OBDII code B0066 GMC to be triggered?
The OBDII code B0066 GMC is typically triggered due to a fault in the left front/driver pretensioner deployment loop, which may be caused by a wiring issue, a faulty pretensioner, or a poor connection.
3. How can I diagnose the OBDII code B0066 GMC?
Diagnosing the OBDII code B0066 GMC involves using a scan tool to read the trouble code, checking the wiring and connections of the left front/driver pretensioner deployment loop, and testing the pretensioner for proper function.
4. What are the potential dangers of ignoring the OBDII code B0066 GMC?
Ignoring the OBDII code B0066 GMC can be dangerous as it indicates a malfunction in the driver pretensioner system, which may result in the airbag not deploying properly in the event of a collision.
5. Can I repair the OBDII code B0066 GMC myself?
Repairing the OBDII code B0066 GMC may require specialized knowledge and tools, so it is recommended to seek the assistance of a qualified mechanic or technician to properly diagnose and fix the issue.
6. Are there any tips for preventing the recurrence of OBDII code B0066 GMC?
To prevent the recurrence of OBDII code B0066 GMC, it is important to regularly inspect the airbag system components, ensure proper wiring connections, and address any warning lights or codes promptly.
7. How much does it typically cost to repair the OBDII code B0066 GMC?
The cost of repairing the OBDII code B0066 GMC can vary depending on the underlying cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts that may be needed.
8. Is it safe to drive my vehicle with the OBDII code B0066 GMC active?
It is not recommended to drive the vehicle with the OBDII code B0066 GMC active, as it indicates a potential safety issue with the driver pretensioner system that could affect the proper deployment of the airbag in an accident.
9. Can the OBDII code B0066 GMC be intermittent?
Yes, the OBDII code B0066 GMC can be intermittent if the underlying issue is related to a loose connection or wiring problem that only occurs under certain conditions.
10. How long does it take to repair the OBDII code B0066 GMC?
The repair time for the OBDII code B0066 GMC can vary depending on the specific cause of the issue and the complexity of the repair process. It is best to consult with a professional technician for an accurate estimate of repair time.
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