What causes a U0486 code?

U0486 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a U0486 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0486 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

U0486

Network/CAN bus communication code U0486

What it means

Invalid Data received from Antenna Control Module. This indicates the module is sending data that does not meet the expected CAN bus format or values.