OBD Guide
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B1B7E

Passenger Seat Weight Sensor 2 Right Front Input Circuit Low

B1B7E is an OBD-II diagnostic trouble code meaning: Passenger Seat Weight Sensor 2 Right Front Input Circuit Low. Common causes: seat weight sensor malfunction, open or shorted wiring harness. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)

Symptoms

  • The airbag warning light comes on
  • The passive safety system may not work correctly
  • The error is stored in the ECU memory

Causes

  • Seat weight sensor malfunction
  • Open or shorted wiring harness
  • Poor contact in the sensor connector
  • Problems with the restraint system ECU

How to Fix

  1. Check the integrity of the wiring harness and connectors
  2. Test the seat weight sensor with a multimeter
  3. Replace the sensor if a fault is detected
  4. Clean or replace connectors if necessary
  5. Reset the error and check if it returns

Related codes

B1B7DB1B7FB1B80

FAQ

What does the B1B7E code mean?

B1B7E is an OBD-II diagnostic trouble code that indicates: Passenger Seat Weight Sensor 2 Right Front Input Circuit Low

What causes a B1B7E error code?

The most common causes of B1B7E include: Seat weight sensor malfunction; Open or shorted wiring harness; Poor contact in the sensor connector; Problems with the restraint system ECU.

How do I fix a B1B7E diagnostic trouble code?

To fix B1B7E: Check the integrity of the wiring harness and connectors. Test the seat weight sensor with a multimeter. Replace the sensor if a fault is detected. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B7E?

Do not drive — repair immediately

How much does it cost to fix B1B7E?

The estimated repair cost for B1B7E is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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