The dreaded Nissan B00a0 error code, often accompanied by a lit airbag light, can be a costly problem if you rely solely on dealership repairs. This code indicates an issue with the Occupant Classification System (OCS), specifically an abnormal voltage in the sensor unit. While dealerships often recommend replacing the entire seat base, a much more affordable and DIY-friendly solution exists for the Infiniti Q60. This guide outlines the steps to replace the faulty sensor, saving you significant time and money.
This guide specifically addresses a 2018 Q60 Luxe with 95,000 KM experiencing the B00A0:00 error. The dealership quoted a costly seat base replacement, claiming individual sensors (part number 98853-3JA0A) were unavailable. However, the Nissan Pathfinder uses an identical sensor, readily available online for a fraction of the price.
Replacing the Occupant Sensor: A Step-by-Step Guide
Before starting, gather the necessary tools and parts: two 98853-3JA0A sensors, red Loctite (thread locker), a ratchet with 12mm and 14mm short sockets, and a diagnostic tool capable of zero point reset and fault code clearing.
Step 1: Passenger Seat Removal
Begin by raising the passenger seat to its highest position. This crucial step simplifies sensor access later. Remove the headrest for easier maneuvering. Next, locate the four bolts securing the seat to the floor. Pull away the plastic covers concealing these bolts.
Using the 14mm socket, carefully remove the four mounting bolts. Gently tilt the seat back, taking care not to damage any wiring or clips. Disconnect the electrical connectors and cable clips by squeezing their ends from the back. Finally, fold the seat and remove it from the vehicle.
Step 2: Sensor Access and Removal
With the seat removed, locate the occupant sensors. One sensor is easily accessible. The other requires removing a small plastic cover panel. This panel is located on the underside of the seat base; gently pull downwards to detach it. The image below highlights the approximate location of this hidden panel.
Loosen all sensor bolts using the 12mm socket for the side bolts and the 14mm socket for the center bolt. Be cautious with the side bolts, as their heads can easily strip. Once loosened, remove the old sensors.
Step 3: Sensor Installation and Reassembly
Apply red Loctite to the center bolt of each new sensor. Install the new sensors, ensuring all bolts are securely tightened. Refer to this image for the precise location of the sensor bolts:
Reinstall the plastic cover panel if removed. Carefully place the seat back into the vehicle, reconnect all electrical connectors and cable clips, and tighten the four mounting bolts. Finally, reattach the headrest.
Step 4: Zero Point Reset and Fault Code Clearing
Using your diagnostic tool, perform a zero point reset on the Occupant Detection System. This step calibrates the new sensors. Afterward, clear any remaining airbag fault codes. A MaxiCom MK808 successfully performed these functions in this instance.
Conclusion
By following this guide, you can effectively address the Nissan B00A0 error in your Infiniti Q60 without the expense of a dealership repair. This DIY approach demonstrates that replacing the occupant sensor is a manageable task for those with basic mechanical skills, saving hundreds of dollars. After completing these steps, the airbag light should be off, and the B00A0 error code should be cleared.
