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B code body Medium severity

B2145 NVM RF HR Failure

The OBD2 code B2145 NVM RF HR Failure indicates a failure related to the non-volatile memory (NVM) in the radio frequency (RF) hardware of a vehicle's system, often linked to issues with the vehicle's communication or...

Definition

The OBD2 code B2145 NVM RF HR Failure indicates a failure related to the non-volatile memory (NVM) in the radio frequency (RF) hardware of a vehicle's system, often linked to issues with the vehicle's communication or control modules

Common causes

  • Faulty Body Control Module (BCM)
  • Corrupted or damaged software in the BCM
  • Poor electrical connections or wiring issues
  • Failed or malfunctioning RF (Radio Frequency) module
  • Low battery voltage or weak battery
  • Interference from other electronic devices
  • Faulty key fob or remote entry system
  • Issues with the vehicle's network communication (CAN bus)

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Defective Key Fob or Keyless Entry System
  • Wiring Issues or Short Circuits
  • Malfunctioning Door Lock Actuator
  • Battery or Power Supply Problems
  • Incorrectly Programmed or Corrupted Software
  • Faulty Antenna or Receiver Module
  • Issues with the Vehicle's Security System

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues that need to be addressed

  2. 2. Inspect Wiring and Connectors

    Examine the wiring and connectors associated with the BCM and any RF-related components. Look for signs of damage, corrosion, or loose connections that could affect communication

  3. 3. Battery Voltage Check

    Ensure that the vehicle's battery is fully charged and that the voltage is within the normal range (typically 12.4 to 12.6 volts). Low voltage can cause various electronic issues

  4. 4. Clear Codes and Test Drive

    Clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive. Sometimes, the code may be a one-time occurrence, and clearing it can resolve the issue

  5. 5. Inspect the BCM

    If the code persists, inspect the body control module for any signs of damage or failure. This may include checking for water intrusion, physical damage, or overheating

  6. 6. Check for Software Updates

    Verify if there are any software updates available for the BCM or other related modules. Manufacturers sometimes release updates to fix known issues

  7. 7. Perform a Hard Reset

    Disconnect the vehicle's battery for a few minutes to reset the BCM and other modules. Reconnect the battery and check if the code reappears

  8. 8. Test RF Components

    If applicable, test any RF components (like key fobs, remote start systems, etc.) to ensure they are functioning correctly. Replace any faulty components as necessary

  9. 9. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the B2145 code for your specific vehicle make and model. Manufacturers may have documented common issues and solutions

  10. 10. Professional Diagnosis

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for a more in-depth diagnosis. They may have specialized tools and knowledge to address complex electronic issues. Always refer to the vehicle's service manual for specific procedures and specifications related to your make and model