Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
ISUZU
Reported code forms P1285
SOME ENGINES MAY OCASSIONALLY EXPERIENCE IDLE FLUCTUATION AND / OR THE MALFUNCTION INDICATOR LAMP WILL ILLUMINATE BECAUSE AN ACCELERATOR POSITION SENSOR (APS) DIAGNOSTIC TROUBLE CODE P1271, P1273, P1275, P1280, OR P1285…
CHEVROLET, GMC
Reported code forms P1285
SUBJECT ON REDUCED ENGINE POWER, DTC (S) P1125, P1275, P1276, P1280, P1281, P1285, AND OR P 1286 MAY BE PRESENT (CURRENT OR IN HISTORY). *MJS