What causes a SPN 7735 code?

SPN 7735 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 SPN 7735 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 7735 active.

How do I fix SPN 7735?

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

J1939 SPN

SPN 7735

Cummins fault code 7735

What it means

Aftertreatment 1 SCR Intake Temperature - Data Erratic, Intermittent, or Incorrect. The ECM detects that the SCR intake temperature sensor signal is fluctuating faster than physically possible or is out of range.