OBD-II Network Error Code U0104: How to Fix It

Q: Can I still drive my car with U0104 error code?

Yes, your vehicle is safe to drive with code U0104. The cruise control simply won't function, but all other driving systems remain operational. However, you should address the issue promptly to restore full vehicle functionality.

Q: Will U0104 cause my car to fail inspection?

This depends on your state's inspection requirements. Some states fail vehicles with any stored diagnostic codes, while others only check emission-related codes. U0104 is not emissions-related, so it typically won't cause inspection failure.

Q: How much does it cost to fix U0104 error code?

Costs vary widely depending on the root cause. A blown fuse costs under $5, while a faulty cruise control module can cost $200-500 plus labor. Most cases involve wiring issues that cost $100-300 to repair at a shop.

Q: Can a dead battery cause U0104 error code?

Yes, low voltage from a weak or failing battery can disrupt communication between modules and trigger U0104. If your battery is more than 3-4 years old, have it tested before diagnosing other causes.

Q: Will disconnecting the battery clear U0104 code?

Disconnecting the battery will temporarily clear stored codes, but U0104 will return if the underlying communication problem isn't fixed. It's better to use an OBD-II scanner to clear codes after completing repairs.

Abstract

Error code U0104 indicates your vehicle's main computer has lost communication with the cruise control module. This network communication error typically prevents cruise control from functioning and may trigger warning lights on your dashboard.