What causes a P1872 code?

P1872 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 P1872 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1872 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

P1872

Turbocharger compressor pressure sensor out of range high

What it means

The Engine Control Module (ECM) detects that the boost pressure at the compressor outlet is higher than the maximum calibrated limit for current engine conditions.