U2150 – SCP (J1850) Invalid Data from REM

The ODBII code U2150 SCP (J1850) Invalid Data from REM indicates that the vehicle’s communication network has received invalid or corrupted data from the Rear Electronic Module (REM), which may affect various functions controlled by that module.

The severity of ODBII code U2150 SCP (J1850) Invalid Data from REM is moderate.

Common Causes For: U2149 U2149: Instrument Cluster Communication Loss

• Faulty Remote Entry Module (REM)
• Poor or damaged wiring/connectors
• Corrupted data communication
• Malfunctioning Body Control Module (BCM)
• Issues with the vehicle’s network (SCP/J1850)
• Low battery voltage or power supply issues
• Interference from aftermarket devices or modifications

Common misdiagnosis for U2150 SCP (J1850) Invalid Data from REM

• Faulty Body Control Module (BCM)
• Faulty Instrument Cluster
• Wiring issues or shorts in the communication network
• Faulty or corroded connectors
• Malfunctioning Remote Entry Module (REM)
• Software issues or programming errors
• Battery or power supply problems
• Faulty sensors related to the communication network

Common Troubleshooting Steps

The OBD-II code U2150 indicates that there is an issue with the communication between the modules in the vehicle, specifically related to the Remote Entry Module (REM) and the SCP (J1850) communication protocol. Here are some common troubleshooting steps to diagnose and resolve the U2150 code:

• Check for Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help in diagnosing the issue.
• Inspect Wiring and Connectors: Visually inspect the wiring and connectors related to the REM and the communication bus. Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the wiring harnesses that connect to the REM and other modules on the SCP network.
• Test the Remote Entry Module (REM): If the wiring and connectors are in good condition, test the REM itself. This may involve checking for proper voltage and ground at the module.
• If possible, perform a functional test of the REM to ensure it is operating correctly.
• Check the SCP Communication Network: Use a scan tool to monitor the SCP communication bus. Check for proper communication between the REM and other modules.
• Look for any signs of communication failure, such as missing messages or inconsistent data.
• Inspect Other Modules: Since the SCP network involves multiple modules, check other modules that communicate on the same bus. A fault in another module can affect the REM’s ability to communicate.
• Ensure that all modules are powered and functioning correctly.
• Check for Short Circuits or Open Circuits: Use a multimeter to check for short circuits or open circuits in the wiring related to the SCP network and the REM.
• Test the resistance of the communication lines to ensure they are within specifications.
• Update or Reprogram Modules: In some cases, a software update or reprogramming of the REM or other affected modules may be necessary to resolve communication issues.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code returns. Monitor the system for any signs of malfunction.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the U2150 code or the specific vehicle model. Manufacturers may have issued guidance on common issues and fixes.
• Seek Professional Help: If the issue persists after performing these steps, consider seeking help from a professional mechanic or dealership with experience in diagnosing and repairing communication issues in vehicles. By following these troubleshooting steps, you should be able to identify and resolve the underlying issue causing the U2150 code.