DTC B00C0-28: Passenger Seat Occupant Classification Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure [11/2023 - ]: Procedure

2025 Toyota Highlander XLE, FWDSECTION Procedure
  1. PERFORM ZERO POINT CALIBRATION 
    1. Using the GTS, perform "Occupant Detection Sensor Zero Point Calibration".

      Refer to INITIALIZATION [11/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK DTC 
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

    3. Turn the ignition switch off.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Check the DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B00C0-28 is output A
      B00C0-28 is not output B

    Result: 

    END (NORMAL AFTER PERFORMING ZERO POINT CALIBRATION) 

    Result: 

    See step  3

  3. REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    3. Replace the separate type front seat cushion spring assembly RH with a new one.

      for Manual Seat: Refer to REMOVAL [11/2023 - ]

      for Power Seat: Refer to REMOVAL [11/2023 - ]

    4. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. PERFORM ZERO POINT CALIBRATION 
    1. Using the GTS, perform "Occupant Detection Sensor Zero Point Calibration".

      Refer to INITIALIZATION [11/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH WAS DEFECTIVE) 

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.