OBD Guide
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B1559

Door Lock Cylinder Circuit Failure

B1559 is an OBD-II diagnostic trouble code meaning: Door Lock Cylinder Circuit Failure. Common causes: broken wires in the harness, lock solenoid malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Doors do not lock/unlock with key fob
  • The doors do not respond to the button in the cabin
  • The fault warning light is flashing

Causes

  • Broken wires in the harness
  • Lock solenoid malfunction
  • Wiring harness damage
  • Problems with the door control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the operation of the lock solenoid
  3. Check connections in door control unit
  4. Replace damaged components

Related codes

B1560B1561B1562

FAQ

What does the B1559 code mean?

B1559 is an OBD-II diagnostic trouble code that indicates: Door Lock Cylinder Circuit Failure

What causes a B1559 error code?

The most common causes of B1559 include: Broken wires in the harness; Lock solenoid malfunction; Wiring harness damage; Problems with the door control unit.

How do I fix a B1559 diagnostic trouble code?

To fix B1559: Check the integrity of the wiring harness. Check the operation of the lock solenoid. Check connections in door control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1559?

Yes, but get it checked soon

How much does it cost to fix B1559?

The estimated repair cost for B1559 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat