B1562 – OBD-II DTC

OBD-II DTC B1562 – Door Lock Cylinder Circuit Short To Ground

DTC B1562 meaning

DTC B1562 refers to a diagnostic trouble code that indicates a short circuit to ground in the door lock cylinder circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle systems for faults. When the vehicle’s computer detects an abnormal voltage level in the door lock cylinder circuit, it triggers this code, signaling a potential issue with the door lock mechanism or its wiring.

DTC B1562 symptoms

Common symptoms associated with DTC B1562 may include:

• Inoperative door locks
• Door locks that do not respond to the key fob or switch
• Intermittent locking or unlocking of doors
• Warning lights on the dashboard related to the door lock system

DTC B1562 causes

Several factors can lead to the triggering of DTC B1562, including:

• Damaged or frayed wiring in the door lock cylinder circuit
• Corroded connectors or terminals
• Faulty door lock actuator
• Short circuit in the wiring harness
• Malfunctioning body control module (BCM)

DTC B1562 seriousness

The seriousness of DTC B1562 can vary depending on the symptoms and the impact on vehicle operation. While it may not pose an immediate safety risk, inoperative door locks can compromise vehicle security. It is advisable to address this issue promptly to ensure proper functionality of the door locking system.

How to diagnose DTC B1562

To diagnose DTC B1562, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1562 code.
2. Inspect the wiring and connectors associated with the door lock cylinder for any visible damage or corrosion.
3. Check the door lock actuator for proper operation.
4. Test the voltage and ground at the door lock cylinder circuit using a multimeter.
5. Examine the body control module for any faults or issues.

How to fix DTC B1562 step-by-step instructions

To fix DTC B1562, follow these steps:

1. Repair or replace any damaged wiring or connectors in the door lock cylinder circuit.
2. Replace the door lock actuator if it is found to be faulty.
3. Ensure all connections are clean and secure to prevent corrosion.
4. Test the door lock system to confirm that it operates correctly.
5. Clear the DTC using an OBD-II scanner and perform a test drive to ensure the code does not return.

How to erase DTC B1562

To erase DTC B1562, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.