What causes a P1896 code?

P1896 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 P1896 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1896 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

P1896

Turbo speed sensor out of range high

What it means

The Engine Control Module (ECM) has detected that the turbocharger shaft speed signal is higher than the calibrated operating limit or is reporting nonsensical high values.