B1755 – OBD-II DTC

OBD-II DTC B1755 – Hazard Flash Output Circuit Short Battery

DTC B1755 meaning

DTC B1755 refers to a diagnostic trouble code indicating a short circuit in the hazard flash output circuit, which is connected to the vehicle’s battery. This code is part of the On-Board Diagnostics II (OBD-II) system and is primarily related to the vehicle’s safety and lighting systems. When this code is triggered, it suggests that there is an electrical fault that may affect the operation of the hazard lights.

DTC B1755 symptoms

Common symptoms associated with DTC B1755 may include:

• Hazard lights not functioning properly
• Dashboard warning lights illuminated
• Intermittent electrical issues in the vehicle
• Inability to activate hazard lights

DTC B1755 causes

Several factors can lead to the triggering of DTC B1755, including:

• Short circuit in the wiring of the hazard flash output circuit
• Faulty hazard switch
• Damaged connectors or terminals
• Corrosion in the electrical system
• Issues with the body control module (BCM)

DTC B1755 seriousness

DTC B1755 is considered a moderate to serious issue. While it may not immediately affect the drivability of the vehicle, it poses a safety risk due to the malfunctioning hazard lights. This can hinder the driver’s ability to signal for help or warn other drivers in case of an emergency.

How to diagnose DTC B1755

To diagnose DTC B1755, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1755 code.
2. Inspect the wiring and connectors related to the hazard flash output circuit for any visible damage or corrosion.
3. Test the hazard switch for proper operation.
4. Check the body control module (BCM) for any faults or issues.
5. Perform continuity tests on the circuit to identify any shorts to the battery.

How to fix DTC B1755 step-by-step instructions

To fix DTC B1755, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors in the hazard flash output circuit.
3. Replace the hazard switch if it is found to be faulty.
4. Clean any corrosion from connectors and terminals to ensure good electrical contact.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the hazard lights to ensure they are functioning correctly.

How to erase DTC B1755

To erase DTC B1755, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the trouble codes section on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to indicate that the codes have been cleared.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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.