B00B5: Driver Seat Track Position Restraints Sensor
What to do
The car drives normally with the airbag light on. The airbag can still deploy but without adjusting for how far forward the seat is — which matters most for shorter drivers sitting close to the wheel. Worth fixing rather than ignoring.
What this code means
The driver seat track position sensor circuit is faulty.
Occupant sensing exists because a deploying airbag is dangerous to somebody in the wrong place, and the system has to know who is in the seat before it decides what to do.
The problem it solves is real and was learned expensively. Early airbags deployed at one force regardless of who was there, and they injured and killed children and small adults in crashes that would otherwise have been survivable. A bag inflating at three hundred kilometres an hour into someone sitting close to it is a weapon, which is why the industry moved to systems that can soften, delay or suppress deployment.
Two quite different questions are being asked, and the standard gives them separate codes. Classification asks who — an adult, a small adult, a child, a child seat, or an empty seat — and is answered mostly by weight. Position asks where — how far the occupant is from the airbag, and whether they are leaning into its path.
Both matter because either alone gives wrong answers. A heavy adult leaning forward is in as much danger from the bag as a light one sitting normally, and weight cannot see that.
Seat track position is the simplest and one of the most useful inputs the module has: how far forward is the seat?
A seat slid fully forward puts the occupant much closer to the airbag — often a short driver who has moved the seat up to reach the pedals, which is exactly the person a full-force deployment is most likely to injure. So the module softens or delays deployment when the seat is far forward, and it needs this sensor to know.
It is usually a simple magnetic or Hall switch on the seat rail, and it fails for mechanical reasons more than electrical ones: debris in the track, a bent rail, or a magnet knocked out of alignment when something was dragged from under the seat.
Likely causes
Start here
- Damaged wiring under the front seats · specialist
- Faulty seat position sensor · specialist
- Corroded or loose connector · specialist
Less common
- Damaged wiring harness · specialist
- Faulty restraints control module · specialist
Symptoms
Components involved
Information, not instruction
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Community experience
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