AutoCodes – Generic – B1559

B1559 Code - Door Lock Cylinder Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Door Lock Cylinder. Common causes include Faulty Door Lock Cylinder, Door Lock Cylinder harness is open or shorted, Door Lock Cylinder circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1559 indicates Door Lock Cylinder Circuit Failure.
Common causes: Common causes include Faulty Door Lock Cylinder, Door Lock Cylinder harness is open or shorted, Door Lock Cylinder circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,315

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1559 Description

The Body Control Module (BCM) monitors the Door Lock Cylinder. The BCM sets the OBDII code when the Door Lock Cylinder is not to factory specifications.

OBDII Code B1559 - Door Lock Cylinder Circuit Failure - AutoCodes.com — B1559 Code - Door Lock Cylinder Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1559?

Faulty Door Lock Cylinder
Door Lock Cylinder harness is open or shorted
Door Lock Cylinder circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1559?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1559 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1559 code?

Need more information on how to fix the B1559 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1559 code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1559 Code

1. What are the common symptoms of OBDII code B1559 (Door Lock Cylinder Circuit Failure)?

- Common symptoms include the door lock not functioning properly, difficulty locking or unlocking the door, and potential warning lights on the dashboard.

2. What are the possible causes of OBDII code B1559?

- The code B1559 can be triggered by issues such as a faulty door lock cylinder, damaged wiring in the door lock circuit, or a malfunctioning door lock actuator.

3. How can I diagnose the Door Lock Cylinder Circuit Failure?

- Diagnosing this issue involves using an OBDII scanner to read the code B1559, inspecting the door lock cylinder, checking the wiring connections, and testing the door lock actuator.

4. Can I still drive my vehicle with OBDII code B1559 present?

- It is generally safe to drive the vehicle with this code, but it is essential to address the issue promptly to ensure the door locks function correctly for safety and security reasons.

5. How can I repair OBDII code B1559 (Door Lock Cylinder Circuit Failure)?

- Repair options may include replacing the door lock cylinder, repairing damaged wiring, or replacing the door lock actuator, depending on the specific cause of the issue.

6. Is it possible to reset OBDII code B1559 without fixing the underlying problem?

- While you can clear the code temporarily, it will likely reappear until the root cause of the Door Lock Cylinder Circuit Failure is addressed.

7. Are there any DIY tips for fixing OBDII code B1559?

- DIY enthusiasts may attempt to inspect and clean the door lock cylinder, check and repair any visible wiring issues, or replace the door lock actuator if they have the necessary skills and tools.

8. Can extreme weather conditions cause OBDII code B1559 to trigger?

- Yes, extreme heat or cold can sometimes affect the door lock cylinder or wiring, leading to issues that trigger the code B1559 for Door Lock Cylinder Circuit Failure.

9. How long does it typically take to repair OBDII code B1559?

- The repair time for OBDII code B1559 can vary depending on the specific cause and the complexity of the repair, but it may range from a few hours to a day in some cases.

10. Is it recommended to seek professional help for fixing OBDII code B1559?

- If you are unsure about diagnosing or repairing the Door Lock Cylinder Circuit Failure, it is advisable to seek assistance from a qualified mechanic or automotive technician to ensure the issue is resolved correctly.