OBD-II Network Error Code U0028: How to Fix It

Q: Can I drive with U0028 error code?

Yes, you can typically drive with U0028, but it may affect diagnostic capabilities and some vehicle systems. The error mainly impacts communication between modules, not basic engine operation. However, get it diagnosed soon to prevent potential issues.

Q: What causes U0028 CAN bus communication error?

U0028 is commonly caused by damaged wiring, loose connections, blown fuses, low battery voltage, faulty control modules, or aftermarket devices interfering with the CAN network. Corrosion in connectors is also a frequent culprit.

Q: How much does it cost to fix U0028 error?

Simple fixes like replacing fuses or cleaning connections cost under $50. Wiring repairs range from $100-300. If a control module needs replacement, costs can range from $300-1500 depending on the specific module and vehicle.

Q: Will U0028 cause my car to fail emissions testing?

Yes, U0028 can cause emissions test failure because it prevents proper communication with emission-related systems. The OBD-II system must be fully functional for emissions compliance, so this code needs to be resolved before testing.

Q: Is U0028 the same on all car brands?

Yes, U0028 is a standardized OBD-II code meaning 'Vehicle Communication Bus A' across all manufacturers. However, the specific diagnostic procedures and module locations vary by make and model.

Abstract

OBD-II error code U0028 indicates a problem with Vehicle Communication Bus A, which is part of the CAN (Controller Area Network) system. This error occurs when the Engine Control Module (ECM) cannot communicate with other control modules in your vehicle. While this may not immediately disable your car, it can prevent proper diagnostics and affect various systems.