WOMS
B code body Medium severity

B2162 Data Mismatch #2 (receive data does not match what was expected)

The OBD2 code B2162 indicates a data mismatch in the vehicle's communication system, where the received data does not match the expected data, often related to a specific module or component

Definition

The OBD2 code B2162 indicates a data mismatch in the vehicle's communication system, where the received data does not match the expected data, often related to a specific module or component

Common causes

  • Faulty wiring or connectors
  • Malfunctioning control modules
  • Corrupted data communication
  • Incorrectly programmed or updated software
  • Interference from aftermarket devices
  • Poor ground connections
  • Faulty sensors or actuators
  • Electrical shorts or opens in the circuit

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Wiring issues or shorts
  • Corrupted software or firmware
  • Faulty sensors or actuators
  • Communication network problems (CAN bus issues)
  • Incorrectly programmed modules
  • Power supply issues to the module
  • Grounding problems

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 Wiring and Connectors

    Examine the wiring and connectors related to the BCM and any other modules involved. Look for signs of damage, corrosion, or loose connections that could cause communication issues

  3. 3. Verify Battery Voltage

    Ensure that the vehicle's battery is fully charged and that the voltage is within the normal range (typically around 12.6 volts when the engine is off). Low voltage can cause communication problems

  4. 4. Check Ground Connections

    Ensure that all ground connections for the BCM and related modules are secure and free of corrosion. Poor ground connections can lead to data mismatches

  5. 5. Inspect Modules

    If the vehicle has been in an accident or has had recent repairs, check to see if any modules have been replaced or if there are compatibility issues. Ensure that all modules are the correct part numbers for the vehicle

  6. 6. Perform a Hard Reset

    Disconnect the vehicle's battery for about 15 minutes to reset the modules. Reconnect the battery and see if the code reappears

  7. 7. Update Software/Firmware

    Check if there are any software updates available for the BCM or other related modules. Sometimes, manufacturers release updates to fix known issues

  8. 8. Scan for Communication Issues

    Use a professional-grade scan tool to check for communication errors between modules. This can help identify if a specific module is not communicating properly

  9. 9. Test the BCM

    If all else fails, the BCM itself may be faulty. Testing or replacing the BCM may be necessary if it is determined to be the source of the problem

  10. 10. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued bulletins regarding known issues and their solutions. 1

  11. 11. Seek Professional Help

    If you are unable to resolve the issue after performing these steps, it may be best to consult a professional mechanic or technician who has experience with OBD-II systems and can perform more advanced diagnostics. By following these steps, you should be able to identify and potentially resolve the issue causing the B2162 code