Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 80 (SUPPLEMENTAL INFLATABLE RESTRAINTS)DIAGNOSTIC INFORMATION AND PROCEDURESPASSENGER PRESENCE SYSTEM REZEROINGPASSENGER PRESENCE SYSTEM RE-ZEROING PROCEDURE
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
Passenger Presence System Re-zeroing Procedure
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Passenger Presence System Re-zeroing Procedure
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Before the passenger presence system can be re-zeroed the front passenger seat must be completely empty of all items. The presence of any liquid or items on the front passenger seat will affect the calibration and operation of the passenger presence system.
- DTC B0081 will set if the re-zero system test is performed with:
- An aftermarket seat heater located too close to the sensor mat
- A scan tool, laptop, or other electronic device is in the seat
- The seat is damp or wet
- An object or person is in the seat
- Verify that the temperature is between 32°F (0°C) to 100°F (38 °C) before running a re-zero procedure.
- Verify the seat is completely dry.
- Empty the front outboard passenger seat.
- Verify that all SIR and passenger presence system components, connectors, and connector position assurances are properly connected and mounted.
- Install a scan tool.
- Turn ON the ignition, with the engine OFF.
- With a scan tool, perform the Passenger Presence Sensor Learn procedure.
- If the test fails, confirm that the seat is empty and completely dry. Perform the Passenger Presence Sensor Learn test again. If the test fails again, verify DTC B0081 is not set as current, if the DTC is set refer to Diagnostic Trouble Code (DTC) List - Vehicle . If the test successfully completed, cycle the ignition OFF.
- After the passenger presence system has been successfully re-zeroed, perform the Diagnostic Repair Verification .
NOTE:
The presence of current DTCs, except DTC B0081 11 or B0081 4B, will prevent the passenger presence system from re-zeroing and may set additional DTCs.
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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.