What causes a P2052 code?

P2052 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 P2052 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2052 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

P2052

Reductant Injection Valve Circuit High Bank 2

What it means

The Engine Control Module (ECM) has detected a voltage higher than the specified range in the Diesel Exhaust Fluid (DEF) doser injector circuit for Bank 2.