What causes a P2108 code?

P2108 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 P2108 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2108 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

P2108

Throttle Actuator Control Performance Error

What it means

The Engine Control Module (ECM) has detected that the actual position of the Intake Throttle Valve (ITV) does not match the commanded position, indicating a mechanical or electrical performance failure.