B1125 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
- B1125 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 B1125 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 B1125?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1125?
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 B1125 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 B1125 code?
Need more information on how to fix the B1125 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1125 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B1125 Acura — Driver Side Power Window Motor 'A' Pulse Error
- B1125 Honda — Driver Side Power Window Motor 'A' Pulse Error
- B1125 Infiniti — Diagnosis Sensor Unit
- B1125 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 B1125 Code
What does OBDII code B1125 indicate?
OBDII code B1125 indicates an issue with the diagnosis sensor unit, which is responsible for monitoring the vehicle's various systems for faults.
What are common symptoms associated with code B1125?
Common symptoms include warning lights on the dashboard, such as the airbag light, and potential issues with the vehicle's safety systems.
What might cause the B1125 code to trigger?
The code can be triggered by a faulty diagnosis sensor unit, wiring issues, poor connections, or problems with related modules or connectors.
How can I diagnose the cause of the B1125 code?
To diagnose the B1125 code, start with a visual inspection of the wiring and connectors associated with the diagnosis sensor unit, then use an OBDII scanner to check for other related codes.
Is it safe to drive with the B1125 code active?
While it might be safe to drive, it is not recommended, as the code often indicates an issue with safety systems like airbags that could compromise vehicle safety.
What repairs might be needed for code B1125?
Repairs can include replacing the diagnosis sensor unit, fixing any damaged wiring, or repairing poor electrical connections.
Can I clear the B1125 code myself?
Yes, you can clear the B1125 code using an OBDII scanner, but it is important to address the underlying issue to prevent the code from reappearing.
Will ignoring the B1125 code cause further damage?
Ignoring the B1125 code can lead to more significant issues, particularly with safety systems that may not function properly in the event of an accident.
How much does it typically cost to repair the diagnosis sensor unit?
Repair costs can vary widely depending on the vehicle model and labor rates, but replacing a diagnosis sensor unit might typically range from $100 to $500 or more.
Discuss the causes and fixes for B1125 OBDII Code
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