What causes a P1283 code?

P1283 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 P1283 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1283 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

P1283

AMF CAN sensor pulsation detected

What it means

P1283 indicates that the engine control module (ECM) has detected pressure pulsations in the exhaust aftertreatment system that exceed the calibrated threshold, often linked to the fuel dosing system performance.