OBD Guide
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B1D77

Seat Recliner Position Sensor Circuit

B1D77 is an OBD-II diagnostic trouble code meaning: Seat Recliner Position Sensor Circuit. Common causes: sensor circuit open, short circuit in the circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Error message on the instrument panel
  • Seat belt reminder not working
  • Incorrect operation of airbags

Causes

  • Sensor circuit open
  • Short circuit in the circuit
  • Malfunction of the sensor itself
  • Wiring harness damage
  • Contact corrosion

How to Fix

  1. Check the condition of the wiring harness and contacts
  2. Check the integrity of the sensor circuit
  3. Replace the seat back position sensor if necessary
  4. Clean contacts from corrosion
  5. Reset the error and check the system operation

Related codes

B1D76B1D78B1D80

FAQ

What does the B1D77 code mean?

B1D77 is an OBD-II diagnostic trouble code that indicates: Seat Recliner Position Sensor Circuit

What causes a B1D77 error code?

The most common causes of B1D77 include: Sensor circuit open; Short circuit in the circuit; Malfunction of the sensor itself; Wiring harness damage.

How do I fix a B1D77 diagnostic trouble code?

To fix B1D77: Check the condition of the wiring harness and contacts. Check the integrity of the sensor circuit. Replace the seat back position sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D77?

Limited driving only, diagnose soon

How much does it cost to fix B1D77?

The estimated repair cost for B1D77 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat