What causes a P1487 code?

P1487 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 P1487 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1487 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

P1487

EGR CAN sensor position fault

What it means

The ECM has detected a mismatch between the commanded position of the Exhaust Gas Recirculation (EGR) valve and the actual position reported by the sensor via the CAN data link.