What causes a U0436 code?

U0436 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 U0436 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0436 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

U0436

Network/CAN bus communication code U0436

What it means

Invalid data received from the Side Obstacle Detection Control Module (Left). This indicates that while the module is talking, the data it is sending is corrupted or incorrect.