OBD Guide
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B1BA4

Passenger Seat Track Position Sensor

B1BA4 is an OBD-II diagnostic trouble code meaning: Passenger Seat Track Position Sensor. Common causes: oxidation or corrosion of sensor contacts, broken or damaged wiring harness to the sensor. Estimated repair cost: $56–167.

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

Symptoms

  • The malfunction indicator on the instrument panel is on
  • Seat position memory system does not work
  • Passenger airbags may not activate correctly
  • Passenger seat is not electrically adjustable
  • The error is displayed in the vehicle diagnostic menu

Causes

  • Oxidation or corrosion of sensor contacts
  • Broken or damaged wiring harness to the sensor
  • Incorrect sensor connector connection
  • Mechanical damage to the seat guide
  • Failure of the position sensor itself
  • Body Control Module (BCM) Malfunction
  • Sensor circuit power supply problem

How to Fix

  1. Connect the diagnostic scanner and confirm code B1BA4
  2. Visually check the sensor wiring harness for damage and oxidation.
  3. Check the reliability of the connection of the sensor connector to the harness connector
  4. Measure the resistance of the sensor with a multimeter (compare with the specification)
  5. Test the power supply and grounding of the sensor circuit
  6. If necessary, reconnect or replace the wiring harness
  7. Check the seat guide mechanism for jamming
  8. Replace the position sensor if it is faulty
  9. Rescan to confirm the error has been resolved

Related codes

B1BA3B1BA5B1BA6U0101U0102

FAQ

What does the B1BA4 code mean?

B1BA4 is an OBD-II diagnostic trouble code that indicates: Passenger Seat Track Position Sensor

What causes a B1BA4 error code?

The most common causes of B1BA4 include: Oxidation or corrosion of sensor contacts; Broken or damaged wiring harness to the sensor; Incorrect sensor connector connection; Mechanical damage to the seat guide.

How do I fix a B1BA4 diagnostic trouble code?

To fix B1BA4: Connect the diagnostic scanner and confirm code B1BA4. Visually check the sensor wiring harness for damage and oxidation.. Check the reliability of the connection of the sensor connector to the harness connector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1BA4?

Do not drive — repair immediately

How much does it cost to fix B1BA4?

The estimated repair cost for B1BA4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat