OBD Guide
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B1D84

Seat Rear Vertical Motor Control Performance Or Incorrect Operation

B1D84 is an OBD-II diagnostic trouble code meaning: Seat Rear Vertical Motor Control Performance Or Incorrect Operation. Common causes: mechanical jamming of the motor, open or shorted wiring harness. Estimated repair cost: $28–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–167 (est.)

Symptoms

  • The seat is not height adjustable
  • The motor runs rough or does not turn on
  • Crunching or strange noises when trying to adjust

Causes

  • Mechanical jamming of the motor
  • Open or shorted wiring harness
  • Problems with the control unit
  • Contact corrosion
  • Faulty relays or fuses

How to Fix

  1. Check fuses and relays
  2. Diagnose the wiring harness for breaks/shorts
  3. Check the adjustment mechanism for binding
  4. Check the operation of the motor with direct connection
  5. If necessary, replace the motor or harness

Related codes

B1D85B1D86U0121

FAQ

What does the B1D84 code mean?

B1D84 is an OBD-II diagnostic trouble code that indicates: Seat Rear Vertical Motor Control Performance Or Incorrect Operation

What causes a B1D84 error code?

The most common causes of B1D84 include: Mechanical jamming of the motor; Open or shorted wiring harness; Problems with the control unit; Contact corrosion.

How do I fix a B1D84 diagnostic trouble code?

To fix B1D84: Check fuses and relays. Diagnose the wiring harness for breaks/shorts. Check the adjustment mechanism for binding. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D84?

Limited driving only, diagnose soon

How much does it cost to fix B1D84?

The estimated repair cost for B1D84 is $28–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat