What causes a P2071 code?

P2071 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 P2071 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2071 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

P2071

IMTC Implausible - Valve Stuck Closed (Bank 1)

What it means

The Engine Control Module (ECM) has detected that the Intake Manifold Tuning (IMT) Valve or Runner Control is stuck in the closed position, affecting high-load air intake.