What causes a P1513 code?

P1513 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 P1513 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1513 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

P1513

DEFOI urea consumption category fault

What it means

The P1513 code indicates a 'Urea Consumption Category Fault,' meaning the system has detected that DEF consumption is significantly lower than expected for the current engine operating conditions.