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.
2021 Honda Pilot EliteFACTORY OEM SERVICE PROCEDURE
Front Passenger's Weight Sensor
FRONT PASSENGER'S WEIGHT SENSOR DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Detection Item |
|---|---|
| 81-51 | Internal failure of the front passenger's weight sensor unit |
| 81-52 | |
| 81-53 | |
| 81-54 | Short to power in the front passenger's weight sensor power circuit |
| 81-55 | Short to ground in the front passenger's weight sensor power circuit |
| 81-56 | Internal failure of the front passenger's weight sensor |
| 81-61 | Wrong combination with the SRS unit |
| 81-71 | Front passenger's weight sensor output check failure |
| 82-11 | Internal failure of the front passenger's weight sensor (front inner side) |
| 82-12 | |
| 82-13 | No signal from the front passenger's weight sensor (front inner side) |
| 82-21 | Internal failure of the front passenger's weight sensor (rear inner side) |
| 82-22 | |
| 82-23 | No signal from the front passenger's weight sensor (rear inner side) |
| 83-31 | Internal failure of the front passenger's weight sensor (front outer side) |
| 83-32 | |
| 83-33 | No signal from the front passenger's weight sensor (front outer side) |
| 83-41 | Internal failure of the front passenger's weight sensor (rear outer side) |
| 83-42 | |
| 83-43 | No signal from the front passenger's weight sensor (rear outer side) |
| 84-81 | Wrong combination with the SRS unit |
| 84-91 | Front passenger's weight sensor not calibrated |
| 84-92 | Front passenger's weight sensor calibration failure |
| 84-93 | Different serial ID of the front passenger's weight sensor (front inner side) |
| 84-94 | Different serial ID of the front passenger's weight sensor (rear inner side) |
| 84-95 | Different serial ID of the front passenger's weight sensor (front outer side) |
| 84-96 | Different serial ID of the front passenger's weight sensor (rear outer side) |
Factory Service Tools
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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.