U0157 Lost Communication with Information Center B
The U0157 code indicates that the vehicle's control module has detected a loss of communication with the Information Center 'B' over the CAN bus network. This module, also known as the driver information module or information display, is responsible for showing vehicle data such as fuel economy, range, warning messages, and other operating parameters. The 'B' designation suggests there are multiple information modules, with this being the secondary one or located in a specific area of the cabin. Communication loss can be due to wiring faults, connector issues, module failure, or power supply interruptions.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Damaged, cut, or shorted CAN bus wiring (CAN-H and CAN-L lines)
- Corroded, loose, or damaged connector pins at the Information Center B
- Internal failure of the Information Center B module (processor or CAN transceiver)
- Open or shorted power or ground circuit to the module (blown fuse, loose connection)
- Incorrect or damaged CAN bus termination resistor
- Electromagnetic interference from damaged wiring or aftermarket accessories
3. Symptoms You Will Notice
- Information display blank or not showing expected data
- Warning lights on the dashboard (e.g., check engine light)
- Missing or incorrect fuel economy, range, or warning messages
4. Step-by-Step Diagnosis
Scan for other related codes and check for communication with other modules
Inspect the CAN bus wiring and connectors for damage, corrosion, or loose pins
Measure voltage and resistance on CAN-H and CAN-L lines at the module connector
Check power and ground circuits at the module (fuse, relay, wiring)
Test the module by swapping with a known good unit if possible
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, but you may lose some driver information displays. The vehicle should remain drivable, but have it diagnosed soon to prevent further issues.
How much does it cost to fix?▼
Diagnosis typically costs $100-$150. Repair costs vary: wiring repair $100-$300, module replacement $200-$600, plus labor.