B2528 – OBD-II DTC

OBD-II DTC B2528 – Left Rear Stop lamp Circuit Short to Battery

DTC B2528 meaning

DTC B2528 refers to a diagnostic trouble code indicating a short circuit in the left rear stop lamp circuit to the battery. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components and systems for faults. When the vehicle’s control module detects an abnormal voltage or current flow in the left rear stop lamp circuit, it triggers this code to alert the technician of a potential issue.

DTC B2528 symptoms

Common symptoms associated with DTC B2528 may include:

• Left rear stop lamp not functioning
• Illumination of the check engine light or warning indicator
• Other rear lighting issues, such as malfunctioning tail lights
• Possible blown fuses related to the lighting circuit

DTC B2528 causes

Several factors can lead to the triggering of DTC B2528, including:

• Short circuit in the wiring harness or connectors
• Faulty left rear stop lamp bulb
• Corrosion or damage in the electrical connections
• Defective stop lamp switch
• Issues with the vehicle’s body control module (BCM)

DTC B2528 seriousness

DTC B2528 is considered a moderate to serious issue. While it may not immediately affect the vehicle’s drivability, it poses a safety risk due to the malfunctioning stop lamp. This can lead to reduced visibility to other drivers, increasing the likelihood of accidents. It is advisable to address this code promptly to ensure proper vehicle operation and safety.

How to diagnose DTC B2528

To diagnose DTC B2528, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the left rear stop lamp bulb for any signs of damage or failure.
3. Check the wiring and connectors for signs of wear, corrosion, or short circuits.
4. Test the stop lamp switch for proper operation.
5. Examine the body control module for any faults or issues.
6. Clear the code and perform a road test to see if the code returns.

How to fix DTC B2528 step-by-step instructions

To fix DTC B2528, follow these step-by-step instructions:

1. Replace the left rear stop lamp bulb if it is faulty.
2. Repair or replace any damaged wiring or connectors in the circuit.
3. Clean any corrosion found on electrical connections.
4. Replace the stop lamp switch if it is defective.
5. Reprogram or replace the body control module if necessary.
6. After repairs, clear the DTC using an OBD-II scanner.
7. Test the left rear stop lamp to ensure it is functioning correctly.

How to erase DTC B2528

To erase DTC B2528, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Access the diagnostic menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and perform a road test to ensure 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.