B1337 – OBD-II DTC

OBD-II DTC B1337 – Door Ajar RR Circuit Short To Battery

DTC B1337 meaning

DTC B1337 refers to a diagnostic trouble code indicating a “Door Ajar RR Circuit Short To Battery.” This code is triggered when the rear right door’s ajar switch circuit detects a short to the battery voltage, suggesting that the circuit is continuously receiving power, which may lead to false readings regarding the door’s status.

DTC B1337 symptoms

Common symptoms associated with DTC B1337 may include:

• Illumination of the dashboard warning lights related to door status.
• Inconsistent or incorrect door ajar notifications.
• Interior lights remaining on when the vehicle is off.
• Possible issues with the vehicle’s alarm system, if equipped.

DTC B1337 causes

Several factors can lead to the triggering of DTC B1337, including:

• A short circuit in the wiring of the rear right door ajar switch.
• Faulty door ajar switch itself.
• Corrosion or damage in the electrical connectors related to the door circuit.
• Issues with the vehicle’s body control module (BCM) that processes the door status signals.

DTC B1337 seriousness

The seriousness of DTC B1337 can vary. While it may not affect the vehicle’s drivability, it can lead to:

• Increased battery drain due to interior lights staying on.
• Potential safety concerns if the door status is inaccurately reported.
• Inconvenience from malfunctioning alarm systems or notifications.

How to diagnose DTC B1337

To diagnose DTC B1337, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1337 code.
2. Inspect the wiring and connectors of the rear right door ajar switch for any visible damage or corrosion.
3. Test the door ajar switch for proper operation using a multimeter.
4. Check for any additional codes that may indicate related issues.
5. Examine the body control module for faults or software issues.

How to fix DTC B1337 step-by-step instructions

To fix DTC B1337, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring or connectors associated with the rear right door ajar switch.
3. If the door ajar switch is faulty, replace it with a new one.
4. Reconnect the battery and clear the DTC using an OBD-II scanner.
5. Test the system by opening and closing the rear right door to ensure the code does not return.

How to erase DTC B1337

To erase DTC B1337, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the trouble codes menu on the scanner.
3. Select the option to clear or erase the codes.
4. Confirm the action and wait for the scanner to indicate that the codes have been cleared.
5. Disconnect the scanner and perform a test drive to ensure the code does not reappear.

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