B0128
Passenger Occupant Detection System Malfunction
The passenger occupant detection system (ODS), used to enable/disable the passenger airbag based on weight, has reported a malfunction.
The passenger occupant detection system (ODS), used to enable/disable the passenger airbag based on weight, has reported a malfunction.
Common causes
- high
Seat sensor mat failure
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-1320
- medium
ODS calibration lost after seat work
A plausible cause — test and verify before replacing parts.
Typical part cost: $220-1320
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for B0128.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for B0128.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for B0128.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does B0128 mean?
B0128 means "Passenger Occupant Detection System Malfunction". It is a generic OBD-II code that points to a fault in the body.
What are the most common causes of B0128?
seat sensor mat failure; ods calibration lost after seat work; loose ods connector — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full B0128 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.