OBD Guide
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B1E45

3rd Row Seat Left Backrest Position Sensor Circuit High

B1E45 is an OBD-II diagnostic trouble code meaning: 3rd Row Seat Left Backrest Position Sensor Circuit High. Common causes: seat back position sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the passive safety system
  • Error message on the dashboard
  • Seat back adjustment problems

Causes

  • Seat back position sensor malfunction
  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Problems with the control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Check connections and contacts in connectors
  3. Test the seat back position sensor
  4. If necessary, replace the sensor or wiring harness

Related codes

B1E44B1E46

FAQ

What does the B1E45 code mean?

B1E45 is an OBD-II diagnostic trouble code that indicates: 3rd Row Seat Left Backrest Position Sensor Circuit High

What causes a B1E45 error code?

The most common causes of B1E45 include: Seat back position sensor malfunction; Open or short circuit in wiring harness; Poor contact in connectors; Problems with the control unit.

How do I fix a B1E45 diagnostic trouble code?

To fix B1E45: Check the integrity of the wiring harness. Check connections and contacts in connectors. Test the seat back position sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1E45?

Do not drive — repair immediately

How much does it cost to fix B1E45?

The estimated repair cost for B1E45 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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