OBD-II Network Error Code U0102: How to Fix It

Q: Can I drive with error code U0102?

You can drive with U0102, but your 4WD system may not function properly. The transfer case might get stuck in one mode, potentially causing driveline damage if you need 4WD capability.

Q: What causes U0102 error code?

Common causes include blown fuses, damaged wiring, corroded connections, failed transfer case control module, or CAN bus network problems. Water damage and rodent damage to wiring are also frequent culprits.

Q: How much does it cost to fix U0102?

Costs range from $20 for a blown fuse to $300-800 for transfer case control module replacement. Most fixes involving wiring repairs cost $150-400 depending on extent of damage.

Q: Will U0102 cause my vehicle to fail inspection?

Yes, U0102 will typically cause your vehicle to fail emissions inspection since it's a communication error code. The code must be resolved and the system must run through complete drive cycles before testing.

Q: Can a weak battery cause U0102?

Yes, a weak or failing battery can cause communication errors including U0102. Low voltage can prevent modules from communicating properly on the CAN bus network.

Abstract

Error code U0102 indicates your vehicle has lost communication with the transfer case control module (TCCM). This communication breakdown prevents the transfer case from receiving proper signals, which can affect 4WD operation and cause the error to appear on your OBD-II scanner.