WOMS
B code body Medium severity

B2144 NVM Alarm Data Failure

The OBD2 code B2144 NVM Alarm Data Failure indicates a malfunction related to the non-volatile memory (NVM) that stores alarm data in the vehicle's system

Definition

The OBD2 code B2144 NVM Alarm Data Failure indicates a malfunction related to the non-volatile memory (NVM) that stores alarm data in the vehicle's system

Common causes

  • Faulty Body Control Module (BCM)
  • Corrupted or missing software in the BCM
  • Electrical short or open circuit in wiring
  • Poor ground connections
  • Faulty sensors or components related to the BCM
  • Low battery voltage or power supply issues
  • Intermittent connections or damaged connectors

Common misdiagnoses

  • Faulty alarm system
  • Wiring issues
  • Battery problems
  • Faulty control module
  • Software glitches
  • Sensor malfunctions
  • Grounding issues
  • Corroded connectors

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue

  2. 2. Inspect Battery and Connections

    Ensure that the vehicle's battery is in good condition and fully charged. Check for any loose or corroded battery terminals and connections, as poor power supply can lead to NVM issues

  3. 3. Perform a Hard Reset

    Disconnect the vehicle's battery for about 15-30 minutes. This can sometimes reset the control modules and clear temporary faults

  4. 4. Check for Software Updates

    Verify if there are any software updates available for the vehicle's control modules. Manufacturers may release updates to address known issues

  5. 5. Inspect Wiring and Connectors

    Examine the wiring and connectors related to the control module that is generating the code. Look for signs of damage, corrosion, or loose connections

  6. 6. Test the Control Module

    If the issue persists, the control module itself may be faulty. Use a scan tool to perform a functional test of the module. If it fails, consider replacing the module

  7. 7. Check for Environmental Factors

    Sometimes, environmental factors such as moisture or extreme temperatures can affect the performance of electronic components. Inspect for any signs of water intrusion or damage

  8. 8. Clear the Code

    After performing the above steps, clear the trouble code using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  9. 9. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the specific make and model of the vehicle. Manufacturers may have documented solutions for common issues

  10. 10. Seek Professional Help

    If the problem persists after performing these steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis and repair. Always refer to the vehicle's service manual for specific procedures and specifications related to the make and model you are working on