B1122 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
- B1122 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 B1122 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 B1122?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1122?
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 B1122 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.
Need more information about the B1122 code?
Need more information on how to fix the B1122 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1122 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B1122 Infiniti — Diagnosis Sensor Unit
- B1122 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 B1122 Code
1. What are common symptoms of OBDII code B1122 related to the Diagnosis Sensor Unit?
- Common symptoms include issues with the vehicle's airbag system, such as the airbag warning light staying on.
2. What causes OBDII code B1122 to be triggered in relation to the Diagnosis Sensor Unit?
- The most common cause is a malfunction or failure of the Diagnosis Sensor Unit itself.
3. How can I diagnose the issue related to OBDII code B1122?
- Diagnosis typically involves using a compatible OBDII scanner to retrieve the specific fault code and investigating the Diagnosis Sensor Unit and its connections.
4. Can I repair OBDII code B1122 related to the Diagnosis Sensor Unit on my own?
- Repairing this code may require specialized knowledge and tools, so it is recommended to consult a professional mechanic for proper diagnosis and repair.
5. Are there any DIY tips for fixing OBDII code B1122 associated with the Diagnosis Sensor Unit?
- DIY tips may include checking the connections to the Diagnosis Sensor Unit, ensuring proper power supply, and inspecting for any visible damage.
6. Is it safe to drive with OBDII code B1122 triggered by the Diagnosis Sensor Unit?
- It is not recommended to drive with this code triggered, as it may indicate a potential issue with the vehicle's safety systems, such as the airbags.
7. How much does it typically cost to repair OBDII code B1122 linked to the Diagnosis Sensor Unit?
- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the Diagnosis Sensor Unit or addressing wiring problems.
8. Can resetting the OBDII system clear the B1122 code related to the Diagnosis Sensor Unit?
- Resetting the OBDII system may temporarily clear the code, but it is essential to address the underlying issue to prevent it from reoccurring.
9. What are the implications of ignoring OBDII code B1122 related to the Diagnosis Sensor Unit?
- Ignoring this code can lead to potential safety hazards in the event of an accident, as the airbag system may not function properly.
10. Are there any recalls or technical service bulletins related to OBDII code B1122 and the Diagnosis Sensor Unit?
- It is advisable to check with the vehicle manufacturer or a certified mechanic to see if there are any relevant recalls or technical service bulletins regarding this issue.
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