What causes a P2417 code?

P2417 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 P2417 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2417 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

P2417

SCR Catalyst Efficiency Low Bank 2

What it means

The Engine Control Module detects that the Selective Catalytic Reduction (SCR) catalyst for bank 2 is not sufficiently reducing NOx emissions. This usually involves a comparison between upstream and downstream NOx sensor readings.