What causes a U0988 code?

U0988 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 U0988 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0988 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

U0988

Network/CAN bus communication code U0988

What it means

Invalid data received from the Seat Control Module (A). Data received on the network from the seat positioning module is outside of calibrated parameters.