B1203 Nissan 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
- B1203 Nissan 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 B1203 Nissan 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 B1203 Nissan?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1203 Nissan?
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 B1203 Nissan 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 B1203 Nissan Code
1. What are common symptoms of OBDII code B1203 in a Nissan related to the Diagnosis Sensor Unit?
The common symptoms include airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.
2. What are the possible causes of OBDII code B1203 in a Nissan indicating a problem with the Diagnosis Sensor Unit?
The code B1203 typically points to a fault in the Diagnosis Sensor Unit itself, such as a malfunction or wiring issue.
3. How can I diagnose the OBDII code B1203 in my Nissan related to the Diagnosis Sensor Unit?
Diagnosing the B1203 code requires using an OBDII scanner to retrieve the specific fault code, followed by checking the Diagnosis Sensor Unit and related wiring for any visible damage or issues.
4. Can I drive my Nissan with OBDII code B1203 related to the Diagnosis Sensor Unit?
It is recommended not to drive the vehicle if the airbag warning light is on due to the potential safety risk of the airbag system not functioning correctly.
5. Is it safe to reset the OBDII code B1203 related to the Diagnosis Sensor Unit in my Nissan?
Resetting the code may temporarily turn off the warning light, but it is crucial to address the underlying issue causing the fault code to ensure the proper operation of the airbag system.
6. What are some repair tips for fixing OBDII code B1203 in a Nissan involving the Diagnosis Sensor Unit?
Repair tips may include checking and repairing any damaged wiring connections, replacing the Diagnosis Sensor Unit if necessary, and ensuring proper installation and calibration.
7. Can a DIY enthusiast fix OBDII code B1203 related to the Diagnosis Sensor Unit in a Nissan?
While some basic troubleshooting steps can be performed by a DIY enthusiast, dealing with airbag system components like the Diagnosis Sensor Unit may require specialized tools and expertise best handled by a professional.
8. How much does it typically cost to repair OBDII code B1203 in a Nissan caused by an issue with the Diagnosis Sensor Unit?
The cost of repair can vary depending on the exact cause of the fault, but it may involve expenses for parts replacement, labor charges, and potential diagnostic fees.
9. Are there any recalls or technical service bulletins related to OBDII code B1203 in Nissan vehicles with Diagnosis Sensor Unit problems?
It is advisable to check with Nissan dealerships or online resources for any recalls or technical service bulletins addressing potential issues with the Diagnosis Sensor Unit triggering the B1203 fault code.
10. What steps should be taken after repairing OBDII code B1203 in a Nissan related to the Diagnosis Sensor Unit to ensure the issue is resolved?
After completing the repair, it is essential to clear the fault code using an OBDII scanner, perform a thorough test of the airbag system, and verify that the airbag warning light remains off during normal driving conditions.
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