B1108 Code - Diagnosis Sensor Unit
Quick Answer
The Air Bag Diagnosis Sensor Unit detects the whole SRS electrical system and displays the malfunction either by illuminating or blinking the air bag warning lamp in the combination meter. Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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
- B1108 indicates Diagnosis Sensor Unit.
- Common causes
- Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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 B1108 Description
The Air Bag Diagnosis Sensor Unit contains the “G†sensors for both frontal and side collisions and spare battery function in case of main battery damaged in a collision.
What are the Possible Causes of the DTC B1108?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1108?
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 B1108 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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Information for Specific Makes
- B1108 Ford — Driver Door Central Locking Motor Commanded Position Not Reachable
- B1108 Infiniti — Diagnosis Sensor Unit
- B1108 Lincoln — Driver Door Central Locking Motor Commanded Position Not Reachable
- B1108 Mercury — Driver Door Central Locking Motor Commanded Position Not Reachable
- B1108 Nissan — Diagnosis Sensor Unit
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 B1108 Code
1. What are common symptoms of OBDII code B1108 related to the Diagnosis Sensor Unit?
- Common symptoms include issues with the airbag system, such as the airbag warning light staying on or flashing.
2. What are possible causes of OBDII code B1108 related to the Diagnosis Sensor Unit?
- Causes may include a faulty diagnosis sensor unit, poor electrical connections, or damaged wiring.
3. How can I diagnose the Diagnosis Sensor Unit issue causing OBDII code B1108?
- Diagnosis typically involves using a diagnostic scan tool to read the code and then inspecting the diagnosis sensor unit and related wiring for any visible damage.
4. Can I repair the Diagnosis Sensor Unit problem causing OBDII code B1108 myself?
- Depending on your skill level and access to tools, you may be able to repair the issue by replacing the diagnosis sensor unit, fixing electrical connections, or repairing damaged wiring.
5. Is it safe to drive with OBDII code B1108 related to the Diagnosis Sensor Unit?
- It is not recommended to drive with this code present, as it indicates a potential issue with the airbag system, which is crucial for safety in the event of a collision.
6. How much does it cost to repair OBDII code B1108 related to the Diagnosis Sensor Unit?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve part replacement and labor costs, which can range from a few hundred to over a thousand dollars.
7. Are there any common DIY fixes for resolving OBDII code B1108 related to the Diagnosis Sensor Unit?
- DIY fixes may include checking and securing electrical connections, inspecting and repairing damaged wiring, or replacing the diagnosis sensor unit if needed.
8. Can resetting the OBDII system clear the B1108 code related to the Diagnosis Sensor Unit?
- Resetting the OBDII system may temporarily clear the code, but if the underlying issue with the diagnosis sensor unit is not addressed, the code is likely to reappear.
9. How urgent is it to address OBDII code B1108 related to the Diagnosis Sensor Unit?
- It is important to address this code promptly, as it indicates a potential problem with the airbag system, which is a critical safety component in your vehicle.
10. What should I do if OBDII code B1108 persists after attempting repairs related to the Diagnosis Sensor Unit?
- If the code persists after attempted repairs, it may be necessary to seek assistance from a professional mechanic with specialized diagnostic tools to pinpoint and resolve the issue.
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