B1908 Code - Short to Positive in Front Pretensioner Squib Left Circuit
Quick Answer
The diagnostic code B1908 indicates a short to positive in the front pretensioner squib left circuit. Common causes include Damaged wiring or connectors in the left front seatbelt pretensioner circuit, Faulty seatbelt pretensioner squib, Corrosion in the wiring or connectors. 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
- B1908 indicates Short to Positive in Front Pretensioner Squib Left Circuit.
- Common causes
- Common causes include Damaged wiring or connectors in the left front seatbelt pretensioner circuit, Faulty seatbelt pretensioner squib, Corrosion in the wiring or connectors.
- 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.
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Code B1908 Description
The diagnostic code B1908 indicates a short to positive in the front pretensioner squib left circuit. In simpler terms, this means that there is a problem with the circuit that controls the left front seatbelt pretensioner in the vehicle. The seatbelt pretensioner is a safety feature that tightens the seatbelt in the event of a collision, helping to restrain the occupant and reduce the risk of injury.
Common Causes of B1908
- Damaged wiring or connectors in the left front seatbelt pretensioner circuit
- Faulty seatbelt pretensioner squib
- Corrosion in the wiring or connectors
- Impact or damage to the vehicle that affects the pretensioner system
Symptoms of B1908
- Illumination of the airbag warning light on the dashboard
- Seatbelt pretensioner not deploying properly in a collision
- Audible warning chimes or messages indicating a safety system malfunction
- Seatbelt pretensioner deploying unexpectedly or intermittently
How to Fix B1908
- Diagnose the issue by using a scan tool to retrieve the specific fault code and identify the location of the short circuit.
- Inspect the wiring and connectors in the left front seatbelt pretensioner circuit for any damage or corrosion.
- Repair or replace any damaged wiring or connectors as needed.
- Test the seatbelt pretensioner system to ensure proper functionality.
- Clear the fault code and reset the airbag system to turn off the warning light on the dashboard.
Cost to Fix B1908
The cost of repairing a short to positive in the front pretensioner squib left circuit can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the cost of parts for this repair can range from $100 to $300, while the labor cost can range from $150 to $300. Overall, the total repair cost for this issue is typically between $250 and $600. However, it is essential to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the labor rates of the auto repair shop. It is recommended to obtain quotes from multiple repair shops to compare prices and ensure a fair deal.
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Code B1908 Information for Specific Makes
- B1908 Hyundai — Rear Sensor PWM Signal Fault
- B1908 KIA — Rear Sensor PWM Signal Fault
- B1908 Lexus — Short to Positive in Front Pretensioner Squib Left Circuit
- B1908 Scion — Short to Positive in Front Pretensioner Squib Left Circuit
- B1908 Toyota — Short to Positive in Front Pretensioner Squib Left Circuit
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 B1908 Code
1. What does the OBDII code B1908 mean?
The B1908 code indicates a "Short to Positive" issue in the front pretensioner squib left circuit, which is part of the vehicle's airbag and seatbelt safety system.
2. What are the common symptoms of the B1908 code?
The most common symptoms include the airbag warning light being illuminated, possible deactivation of the seatbelt pretensioner system, and no noticeable changes in vehicle performance.
3. What causes the B1908 code to appear?
The code is typically triggered by a short circuit to a positive voltage in the left front pretensioner squib wiring, damaged connectors, or a faulty pretensioner.
4. Is it safe to drive with the B1908 code present?
No, it is not safe to drive with this code active because it indicates a potential issue with the vehicle's safety restraint system, which may not function properly in an accident.
5. How can I diagnose the B1908 code?
Diagnosis involves inspecting the wiring and connectors in the left front pretensioner circuit for damage, checking for shorts to positive voltage, and testing the pretensioner with a multimeter.
6. What tools are needed to repair the B1908 code?
You may need an OBDII scanner, a multimeter, and basic hand tools to inspect, diagnose, and repair the wiring or pretensioner system.
7. Can I reset the airbag warning light after fixing the B1908 code?
Yes, you can reset the airbag warning light using an OBDII scanner, but only after confirming that the issue causing the code has been resolved.
8. How much does it cost to fix the B1908 code?
The repair cost varies depending on the issue, but it may range from $50 for simple wiring repairs to $300 or more if the pretensioner needs replacement.
9. Can a faulty airbag control module cause the B1908 code?
While less common, a malfunctioning airbag control module can sometimes lead to this code, especially if it misinterprets signals from the pretensioner circuit.
10. Should I attempt to repair the B1908 code myself?
If you are experienced with automotive electrical systems, you can attempt the repair. However, due to the safety-critical nature of the airbag system, it’s recommended to seek professional assistance.
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