B2603 – OBD-II DTC

OBD-II DTC B2603 – PSD Not Fully Closed During Self-Test

DTC B2603 meaning

DTC B2603 refers to a diagnostic trouble code indicating that the Power Sliding Door (PSD) is not fully closed during the self-test process. This code is typically associated with vehicles equipped with power sliding doors, which are designed to open and close automatically. The self-test is a routine check performed by the vehicle’s onboard diagnostic system to ensure that all components are functioning correctly.

DTC B2603 symptoms

Common symptoms associated with DTC B2603 may include:

• Power sliding door not operating correctly
• Door may remain partially open or closed
• Warning lights on the dashboard related to the door system
• Unusual noises when attempting to operate the door

DTC B2603 causes

Several factors can lead to the triggering of DTC B2603, including:

• Faulty door position sensors
• Obstructions in the door track
• Wiring issues or short circuits in the door control system
• Malfunctioning door motor or actuator
• Software glitches in the vehicle’s control module

DTC B2603 seriousness

The seriousness of DTC B2603 can vary based on the symptoms and the vehicle’s usage. While it may not pose an immediate safety risk, a malfunctioning power sliding door can lead to:

• Inconvenience for passengers
• Potential for further electrical issues
• Increased wear on the door mechanism

It is advisable to address this code promptly to prevent further complications.

How to diagnose DTC B2603

To diagnose DTC B2603, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the power sliding door for any visible obstructions or damage.
3. Check the door position sensors for proper operation.
4. Examine the wiring and connectors for signs of wear or damage.
5. Test the door motor and actuator for functionality.
6. Clear the code and perform a self-test to see if it reappears.

How to fix DTC B2603 step-by-step instructions

To fix DTC B2603, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect the power sliding door for any obstructions and remove them.
3. Test the door position sensors and replace them if faulty.
4. Check and repair any damaged wiring or connectors.
5. Test the door motor and actuator replace if necessary.
6. Reassemble any components that were removed during inspection.
7. Perform a self-test to ensure the door operates correctly and the code does not return.

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.