What causes a P1526 code?

P1526 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 P1526 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1526 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

P1526

CM1 000986 out of range fault

What it means

PUX/PACCAR P1526 indicates the VGT Actuator position is out of its calibrated range. The ECM detects that the turbo vanes are not reaching the commanded position or have moved beyond physical limits.