What causes a P0417 code?

P0417 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 P0417 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0417 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

P0417

Secondary Air Injection System Switching Valve B Circuit Shorted

What it means

Indicates a short circuit condition detected in the secondary air injection switching valve 'B' circuit, typically affecting emission control air pump logic or EGR bypass cooling systems on certain heavy-duty applications.