B1336 – OBD-II DTC

OBD-II DTC B1336 – Door Ajar RR Circuit Open

DTC B1336 meaning

DTC B1336 refers to a diagnostic trouble code indicating that there is an issue with the Door Ajar circuit for the rear right door. This code is triggered when the vehicle’s onboard diagnostic system detects an open circuit in the door ajar switch, which is responsible for signaling whether the door is closed or open. The system monitors the status of the door to ensure proper operation of features such as interior lights and alarm systems.

DTC B1336 symptoms

Common symptoms associated with DTC B1336 may include:

• Illumination of the check engine light or warning indicator on the dashboard.
• Interior lights remaining on when the vehicle is in motion.
• Inconsistent door ajar warnings or alerts.
• Possible issues with the vehicle’s alarm system, such as false alarms.

DTC B1336 causes

Several factors can lead to the triggering of DTC B1336, including:

• A faulty door ajar switch in the rear right door.
• Wiring issues, such as frayed or broken wires in the door harness.
• Corrosion or poor connections at the door switch or related connectors.
• Faulty body control module (BCM) that fails to interpret the door status correctly.

DTC B1336 seriousness

The seriousness of DTC B1336 can vary depending on the symptoms experienced. While it may not pose an immediate safety risk, it can lead to:

• Inconvenience due to interior lights staying on.
• Potential battery drain if the issue is not resolved.
• Complications with the vehicle’s alarm system.

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

How to diagnose DTC B1336

To diagnose DTC B1336, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1336 code.
2. Inspect the rear right door ajar switch for physical damage or wear.
3. Check the wiring and connectors for signs of corrosion or damage.
4. Test the door ajar switch with a multimeter to ensure it operates correctly.
5. Examine the body control module for any faults or error codes.

How to fix DTC B1336 step-by-step instructions

To fix DTC B1336, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and replace the door ajar switch if it is found to be faulty.
3. Repair or replace any damaged wiring or connectors in the door harness.
4. Clean any corrosion found on connectors and ensure all connections are secure.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the system by opening and closing the rear right door to ensure the code does not return.

How to erase DTC B1336

To erase DTC B1336, 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. Navigate to the option to clear or erase trouble codes on the scanner.
4. Confirm the action to erase the DTC.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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