What causes a P2048 code?

P2048 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 P2048 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2048 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

P2048

P2048 Reductant Injector Circuit Low Bank 1 Unit 1

What it means

The engine control module detects a low voltage condition in the Selective Catalytic Reduction (SCR) dosing valve circuit, indicating a potential short to ground or an open circuit.