B2159 – OBD-II DTC

OBD-II DTC B2159 – Memory #1 output Short to Ground

DTC B2159 meaning

DTC B2159 refers to a diagnostic trouble code indicating a “Memory #1 output Short to Ground.” This code is typically associated with the vehicle’s body control module (BCM) and indicates that there is an electrical short circuit in the Memory #1 output circuit, which can affect various vehicle functions.

DTC B2159 symptoms

Common symptoms associated with DTC B2159 may include:

• Inoperative memory seat functions
• Malfunctioning power windows
• Issues with door locks
• Warning lights on the dashboard
• Erratic behavior of electrical components

DTC B2159 causes

The causes of DTC B2159 can vary, but common factors include:

• Wiring issues such as frayed or damaged wires
• Corroded connectors or terminals
• Faulty body control module (BCM)
• Short circuits in the Memory #1 output circuit
• Improper installation of aftermarket accessories

DTC B2159 seriousness

DTC B2159 is considered a moderate to serious issue. While it may not immediately affect the vehicle’s drivability, it can lead to further electrical problems and malfunctions of critical systems if not addressed promptly. Ignoring this code may result in more extensive repairs down the line.

How to diagnose DTC B2159

To diagnose DTC B2159, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the wiring and connectors related to the Memory #1 output for any visible damage or corrosion.
3. Check for any additional DTCs that may provide more context.
4. Perform a continuity test on the Memory #1 output circuit to check for shorts to ground.
5. Test the body control module (BCM) for proper operation.

How to fix DTC B2159 step-by-step instructions

To fix DTC B2159, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety.
2. Inspect and repair any damaged wiring or connectors related to the Memory #1 output.
3. If the BCM is faulty, replace it with a new or refurbished unit.
4. Reconnect the battery and clear the DTC using an OBD-II scanner.
5. Test the vehicle’s electrical systems to ensure proper functionality.

How to erase DTC B2159

To erase DTC B2159, 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 “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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