B1795 – OBD-II DTC

OBD-II DTC B1795 – Lamp Headlamp Low-Beam Circuit Open

DTC B1795 meaning

DTC B1795 refers to a diagnostic trouble code indicating an open circuit in the low-beam headlamp 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 that the low-beam headlamp circuit is not functioning correctly, it triggers this code to alert the technician of the issue.

DTC B1795 symptoms

Common symptoms associated with DTC B1795 may include:

• Low-beam headlights not functioning
• Dashboard warning lights illuminated
• Inconsistent headlamp operation
• Possible flickering of the low-beam lights

DTC B1795 causes

Several factors can lead to the triggering of DTC B1795, including:

• Faulty headlamp bulb
• Damaged wiring or connectors in the low-beam circuit
• Defective headlamp relay
• Issues with the vehicle’s body control module (BCM)
• Corrosion or poor connections in the electrical system

DTC B1795 seriousness

DTC B1795 is considered a moderate to serious issue. While it may not affect the vehicle’s overall drivability, it poses a safety risk due to the potential loss of low-beam headlamp functionality. This can impair visibility during nighttime driving or in low-light conditions, increasing the risk of accidents.

How to diagnose DTC B1795

To diagnose DTC B1795, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1795 code.
2. Inspect the low-beam headlamp bulbs for any signs of damage or failure.
3. Check the wiring and connectors for any visible damage, corrosion, or loose connections.
4. Test the headlamp relay for proper operation.
5. Examine the body control module (BCM) for any faults or issues.
6. Perform continuity tests on the low-beam circuit to identify any open circuits.

How to fix DTC B1795 step-by-step instructions

To fix DTC B1795, follow these step-by-step instructions:

1. Replace any faulty low-beam headlamp bulbs.
2. Repair or replace damaged wiring or connectors in the low-beam circuit.
3. Replace the headlamp relay if it is found to be defective.
4. If the BCM is faulty, consider reprogramming or replacing it as necessary.
5. Ensure all connections are clean and secure to prevent future issues.
6. Clear the DTC using an OBD-II scanner and test the low-beam headlights to confirm proper operation.

How to erase DTC B1795

To erase DTC B1795, 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. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.