OBD Guide
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B1BBB

Passenger Seat Weight Sensor Input Shorted Together

B1BBB is an OBD-II diagnostic trouble code meaning: Passenger Seat Weight Sensor Input Shorted Together. Common causes: damaged wiring harness, seat weight sensor malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • SRS/Airbag light is on
  • The airbag system may turn off
  • False airbag deployments

Causes

  • Damaged wiring harness
  • Seat weight sensor malfunction
  • Corroded or oxidized connectors
  • Problems with the SRS control unit

How to Fix

  1. Check the integrity of wiring and connectors
  2. Test seat weight sensor
  3. Replace damaged wires or sensor
  4. Reset the error and check the system

Related codes

B1BBAB1BBCB1BBD

FAQ

What does the B1BBB code mean?

B1BBB is an OBD-II diagnostic trouble code that indicates: Passenger Seat Weight Sensor Input Shorted Together

What causes a B1BBB error code?

The most common causes of B1BBB include: Damaged wiring harness; Seat weight sensor malfunction; Corroded or oxidized connectors; Problems with the SRS control unit.

How do I fix a B1BBB diagnostic trouble code?

To fix B1BBB: Check the integrity of wiring and connectors. Test seat weight sensor. Replace damaged wires or sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1BBB?

Do not drive — repair immediately

How much does it cost to fix B1BBB?

The estimated repair cost for B1BBB is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat