U2495 – Lost Communication with the Hybrid Powertrain Control Module (HPCM) A.

The ODBII code U2495 indicates a loss of communication with the Hybrid Powertrain Control Module (HPCM) A, which may affect the vehicle’s hybrid system functionality.

The severity of ODBII code U2495 is typically considered moderate to severe.

Common Causes For: U2494 U2494: BECM Communication Error – Invalid Data

• Faulty Hybrid Powertrain Control Module (HPCM)
• Damaged or corroded wiring or connectors
• Poor ground connection
• Failed communication network (CAN bus issues)
• Blown fuses
• Software or firmware issues
• Battery or power supply problems

Common misdiagnosis for U2495 Lost Communication with the Hybrid Powertrain Control Module (HPCM) A.

• Faulty wiring or connectors
• Defective Hybrid Powertrain Control Module (HPCM)
• Issues with the Engine Control Module (ECM)
• Battery or charging system problems
• Faulty sensors related to the hybrid system
• Communication issues with other control modules
• Software or firmware issues in the HPCM or ECM

Common Troubleshooting Steps

When dealing with OBD-II code U2495, which indicates “Lost Communication with the Hybrid Powertrain Control Module (HPCM) A,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Check for Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide additional context and help identify related issues.
• Inspect the Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors related to the HPCM for any signs of damage, corrosion, or loose connections.
• **Connector Pins: Ensure that the pins in the connectors are not bent, corroded, or damaged.
• Check Power and Ground: Verify that the HPCM is receiving the correct voltage and ground. Use a multimeter to check for proper voltage at the module’s power supply pins.
• Check the ground connections to ensure they are secure and free of corrosion.
• Inspect the HPCM: If the wiring and connections are intact, the HPCM itself may be faulty. Check for any signs of physical damage or water intrusion.
• If possible, test the HPCM in another vehicle to confirm its functionality.
• Check Communication Lines: Use a scan tool to monitor communication between the HPCM and other modules. If communication is lost, it may indicate a problem with the CAN bus or other communication lines.
• Inspect the CAN bus wiring for shorts, opens, or interference.
• Perform a Network Test: If you have access to a professional-grade scan tool, perform a network test to check for communication issues between modules.
• Look for any modules that are not responding or showing communication errors.
• Reset the Codes: After performing inspections and repairs, clear the codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Check for Software Updates: Sometimes, software issues can cause communication problems. Check with the manufacturer for any available updates for the HPCM or other related modules.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on common issues related to the HPCM.
• Seek Professional Help: If the issue persists after performing these steps, it may be necessary to consult a professional technician or dealership for further diagnosis and repair. By following these steps, you can systematically identify and address the root cause of the U2495 code.