B1204 Infiniti Code - Diagnosis Sensor Unit
Quick Answer
The B1204 code in an Infiniti indicates a fault in the Diagnosis Sensor Unit. Common causes include Faulty Diagnosis Sensor Unit, Wiring issues or shorts in the sensor unit circuit, Poor connection between the sensor unit and the vehicle's computer. 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
- B1204 Infiniti indicates Diagnosis Sensor Unit.
- Common causes
- Common causes include Faulty Diagnosis Sensor Unit, Wiring issues or shorts in the sensor unit circuit, Poor connection between the sensor unit and the vehicle's computer.
- 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.
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Code B1204 Infiniti Description
The B1204 code in an Infiniti indicates a fault in the Diagnosis Sensor Unit. This unit is responsible for monitoring various systems in the vehicle and relaying important data to the onboard computer. When this sensor unit malfunctions, it can lead to a range of issues affecting the vehicle's performance and safety.
Common Causes of B1204 Infiniti
- Faulty Diagnosis Sensor Unit.
- Wiring issues or shorts in the sensor unit circuit.
- Poor connection between the sensor unit and the vehicle's computer.
- Water or moisture damage to the sensor unit.
- Impact or physical damage to the sensor unit.
Symptoms of B1204 Infiniti
- Airbag warning light illuminated on the dashboard.
- ABS warning light is on.
- Traction control system not functioning properly.
- Inaccurate or erratic readings from other vehicle sensors.
- Vehicle may go into limp mode or have reduced performance.
How to Fix B1204 Infiniti
- Begin by conducting a thorough diagnostic scan to confirm the B1204 code and identify the specific issue with the Diagnosis Sensor Unit.
- Inspect the wiring and connections related to the sensor unit for any damage or corrosion.
- If the sensor unit is found to be faulty, it will need to be replaced with a new unit.
- Clear the error code from the vehicle's computer and perform a test drive to ensure the issue has been resolved.
- Reset any affected systems, such as the airbag system or ABS, to ensure they are functioning correctly after the repair.
Cost to Fix B1204 Infiniti
The cost of repairing a B1204 code in an Infiniti can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor to address this problem. Keep in mind that rates at auto repair shops can vary, so it's a good idea to get quotes from multiple shops to find the best price. Additionally, factors such as the vehicle's make and model, as well as the extent of the repair needed, can also impact the final cost.
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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 B1204 Infiniti Code
1. What are the common symptoms of OBDII code B1204 in an Infiniti related to the Diagnosis Sensor Unit?
The common symptoms include issues with the airbag system, such as the airbag warning light staying illuminated on the dashboard.
2. What are the possible causes of OBDII code B1204 in an Infiniti?
The likely causes of this code could be a faulty Diagnosis Sensor Unit, damaged wiring or connectors in the airbag system, or a malfunctioning airbag control module.
3. How can I diagnose OBDII code B1204 in my Infiniti related to the Diagnosis Sensor Unit?
To diagnose this code, you may need to use a diagnostic scan tool to retrieve the specific fault codes stored in the airbag system. Additionally, visually inspecting the wiring and connectors for any damage is recommended.
4. Can I repair OBDII code B1204 in my Infiniti at home?
While some basic troubleshooting like checking for loose connections or damaged wiring can be done at home, more complex repairs involving the airbag system should be handled by a professional to ensure safety and proper functioning.
5. Is it safe to drive my Infiniti with OBDII code B1204 related to the Diagnosis Sensor Unit?
It is not recommended to drive the vehicle with an illuminated airbag warning light, as it indicates a potential issue with the airbag system's functionality, which is crucial for safety in the event of a collision.
6. How much does it typically cost to repair OBDII code B1204 in an Infiniti?
The cost of repairs for this code can vary depending on the exact cause of the issue and the labor rates in your area. It is advisable to get a professional diagnosis to determine the exact repair cost.
7. Can resetting the OBDII system clear the B1204 code in my Infiniti?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue with the Diagnosis Sensor Unit persists, the code is likely to reappear. It's important to address the root cause of the problem.
8. Will OBDII code B1204 cause my airbags to deploy unexpectedly in my Infiniti?
While the code itself does not directly cause the airbags to deploy unexpectedly, it indicates a fault in the airbag system that could potentially affect the proper deployment of the airbags in the event of a collision.
9. Can a DIY enthusiast replace the Diagnosis Sensor Unit to fix OBDII code B1204 in an Infiniti?
Replacing the Diagnosis Sensor Unit involves working with the airbag system, which is a safety-critical component. It is strongly recommended to have a qualified technician handle the replacement to ensure proper installation and functionality.
10. How long does it take to repair OBDII code B1204 related to the Diagnosis Sensor Unit in an Infiniti?
The repair time can vary based on the exact issue causing the code and the expertise of the technician. Simple fixes like reconnecting loose wiring may take less time, while more complex repairs could require several hours or more.
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