B1203 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 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 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?
- 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?
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 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 B1203 code?
Need more information on how to fix the B1203 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1203 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B1203 Ford — Fuel Sender Circuit Short To Battery
- B1203 Infiniti — Diagnosis Sensor Unit
- B1203 Lincoln — Fuel Sender Circuit Short To Battery
- B1203 Mercury — Fuel Sender Circuit Short To Battery
- B1203 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 B1203 Code
1. What are the common symptoms of OBDII code B1203 (Diagnosis Sensor Unit)?
- Common symptoms include issues with the airbag system, the airbag warning light staying on, and potential problems with the vehicle's safety systems.
2. What are the possible causes of OBDII code B1203?
- The code B1203 is usually triggered by a malfunction in the diagnosis sensor unit, which may be caused by wiring issues, sensor failure, or a faulty control module.
3. How can I diagnose the Diagnosis Sensor Unit issue related to code B1203?
- To diagnose the Diagnosis Sensor Unit problem, you will need a scan tool to retrieve the specific fault codes, perform a visual inspection of the wiring and connections, and potentially test the sensor unit itself.
4. Can I drive my vehicle with OBDII code B1203 present?
- It is not recommended to drive the vehicle with a B1203 code present, as it indicates a potential problem with the airbag system that could affect its functionality in the event of a collision.
5. How do I repair OBDII code B1203?
- Repairing OBDII code B1203 may involve repairing or replacing damaged wiring, replacing the diagnosis sensor unit, or reprogramming the control module. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.
6. Is it safe to reset the OBDII code B1203 without fixing the underlying issue?
- Resetting the code without addressing the underlying issue is not recommended, as the problem may persist and compromise the safety of the vehicle's airbag system.
7. Can a DIY enthusiast fix OBDII code B1203 at home?
- While some DIY enthusiasts may have the skills to diagnose and repair OBDII code B1203, it is recommended to seek professional help due to the complexity of airbag systems and the importance of proper repairs for safety.
8. Are there any recalls related to OBDII code B1203 for certain vehicle models?
- It is advisable to check with the vehicle manufacturer or the National Highway Traffic Safety Administration (NHTSA) for any recalls related to OBDII code B1203 affecting specific vehicle models.
9. How long does it typically take to repair OBDII code B1203?
- The repair time for OBDII code B1203 can vary depending on the underlying issue, the availability of parts, and the expertise of the mechanic. It is best to consult a professional for an accurate estimate.
10. What is the cost of repairing OBDII code B1203?
- The cost of repairing OBDII code B1203 can vary widely depending on the specific issue, parts required, labor rates, and whether the repair is done at a dealership or an independent repair shop. It is recommended to obtain quotes from different sources for comparison.
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