OBD Guide
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B1B89

Passenger Seat Weight Sensor 1 Right Rear Input Circuit High

B1B89 is an OBD-II diagnostic trouble code meaning: Passenger Seat Weight Sensor 1 Right Rear Input Circuit High. Common causes: passenger weight sensor malfunction, wiring harness damage. Estimated repair cost: $56–167.

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

Symptoms

  • The passive safety system fault indicator is on
  • Incorrect operation of airbags
  • Error persists after scanning

Causes

  • Passenger weight sensor malfunction
  • Wiring harness damage
  • Short circuit in the circuit
  • Problems with the control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the resistance of the load cell
  3. Check the voltage in the circuit
  4. Replace sensor if necessary
  5. Reset the error and check the system

Related codes

B1B88B1B90B1B91

FAQ

What does the B1B89 code mean?

B1B89 is an OBD-II diagnostic trouble code that indicates: Passenger Seat Weight Sensor 1 Right Rear Input Circuit High

What causes a B1B89 error code?

The most common causes of B1B89 include: Passenger weight sensor malfunction; Wiring harness damage; Short circuit in the circuit; Problems with the control unit.

How do I fix a B1B89 diagnostic trouble code?

To fix B1B89: Check the integrity of the wiring harness. Check the resistance of the load cell. Check the voltage in the circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B89?

Do not drive — repair immediately

How much does it cost to fix B1B89?

The estimated repair cost for B1B89 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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