U2159 – Lost Communication with Instrument Cluster.
The ODBII code U2159 indicates a loss of communication between the vehicle’s control modules and the instrument cluster, which may result in the cluster not displaying information correctly.
The severity of OBDII code U2159 is generally considered moderate to severe.
Common Causes For: U2158 U2158: Instrument Cluster Communication Loss
- Faulty instrument cluster
- Damaged wiring or connectors
- Poor ground connection
- Failed communication network (CAN bus)
- Malfunctioning body control module (BCM)
- Software issues or programming errors
- Corroded terminals or connectors
- Low battery voltage or power supply issues
Common misdiagnosis for U2159 Lost Communication with Instrument Cluster.
- Faulty Instrument Cluster
- Bad Wiring or Connectors
- Faulty Body Control Module (BCM)
- Faulty Engine Control Module (ECM)
- Power Supply Issues
- Faulty CAN Bus Communication
- Faulty Sensors or Modules in the Network
Common Troubleshooting Steps
When dealing with the OBD-II code U2159, which indicates “Lost Communication with Instrument Cluster,” 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 more context and help identify related issues.
- Inspect the Instrument Cluster: **Visual Inspection: Check for any visible damage to the instrument cluster, such as cracks or burnt components.
- **Connections: Ensure that the connectors and wiring harnesses to the instrument cluster are secure and free from corrosion or damage.
- Check Fuses: Inspect the fuses related to the instrument cluster and the communication network. Replace any blown fuses.
- Examine Wiring and Connectors: Look for damaged, frayed, or shorted wires in the harness leading to the instrument cluster.
- Ensure that all connectors are properly seated and that there are no bent pins.
- Test the Instrument Cluster: If possible, test the instrument cluster by connecting a known good unit to see if the problem persists. This can help determine if the cluster itself is faulty.
- Check Communication Lines: Use a multimeter or an oscilloscope to check for proper voltage and signal on the communication lines (CAN bus, LIN bus, etc.) that connect the instrument cluster to the vehicle’s network.
- Look for any interruptions or shorts in the communication lines.
- Inspect Other Modules: Since the instrument cluster communicates with other modules (like the ECM, BCM, etc.), check these modules for faults or communication issues.
- Ensure that all modules are functioning correctly and that there are no communication errors.
- Battery and Ground Connections: Check the vehicle’s battery voltage and ensure it is within the normal range.
- Inspect ground connections for the instrument cluster and other related modules to ensure they are clean and secure.
- Software Updates: Check if there are any available software updates for the vehicle’s modules. Sometimes, communication issues can be resolved with a software update.
- Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.1
- Consult a Professional: If the issue persists after all troubleshooting steps, it may be necessary to consult a professional mechanic or technician who has access to advanced diagnostic tools and equipment. By following these steps, you should be able to identify the root cause of the U2159 code and take appropriate action to resolve the communication issue with the instrument cluster.