B0092: Seat Belt Pretensioner Resistive Load, Driver

What B0092 tells you, and what it does not

The airbag module tests the pretensioner circuit by checking its electrical resistance, and this reading is outside the range the module expects, which points to a wiring or connector problem more often than the pretensioner unit itself.

The code sits in the driver seat belt pretensioner circuit area and is reported by the comprehensive component monitor. It names the circuit or the condition where the computer saw a reading outside its expected range. It does not name a failed part, and several genuinely different faults set this same code, which is the whole reason the causes below are ordered rather than listed.

What people usually notice

• Airbag warning light on
• No change in seat belt feel during normal use
• Warning light on at every startup
• No physical drivability change

What causes B0092?

The causes below are ordered by how often they turn out to be the answer, cheapest and most common first. That order matters more than the list itself: the expensive component named in the code text is very rarely the first thing to replace, and working down from the top is what stops a driver seat belt pretensioner circuit fault becoming an expensive guess.

Corroded connector is the one to rule out before anything else. The most common and cheapest cause to check first.

Working out which cause it is

Start with freeze frame. There is no engine style freeze frame for an airbag code, check the airbag module fault history instead. That snapshot is taken at the instant the code set, and it is the single most useful piece of evidence you have, which is also why clearing the code before reading it is such a costly habit.

Diagnosing this one properly means commanding a component and watching whether it responds, which a read-only tool cannot do at any price. A basic code reader cannot see airbag module codes at all, a tool with full SRS system access is needed to read and verify the restraint circuit resistance.

The order worth working in

• 1. Corroded connector: The most common and cheapest cause to check first.
• 2. Wiring resistance increased from age or corrosion: A slightly corroded connection can raise resistance enough to trip this test without fully failing.
• 3. Loose connector pin: A pin that is not fully seated increases resistance intermittently.
• 4. Water intrusion: Moisture at the connector changes its resistance reading.
• 5. Failing pretensioner unit: Least likely, but the unit itself can develop an internal resistance fault.

What B0092 means for driving the car

The seat belt pretensioner may not fire correctly in a crash while this fault is present, get this checked rather than treating it as minor.

This is a severity 3 of 4 code, which means continuing to drive normally risks damage that costs considerably more than the repair in front of you. Treat the lamp as an instruction rather than a notification.

What does it cost to ignore B0092?

There is no cost in everyday drivability from ignoring this, the cost is entirely in reduced seat belt protection during a crash.

There is also the diagnostic cost of waiting. Freeze frame data, pending code history and the readiness monitor state all describe the fault as it was when it set, and all of it is lost the moment somebody clears the code to make the lamp go out.