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P1890 on the 2016 Honda Accord

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.

Bulletins for this model year that name P1890
PUD - 2015-16 AC2016-12-14. Service bulletin. CUSTOMER LETTER - UNDER CERTAIN DRIVING CONDITIONS, THE SOFTWARE IN THE PCM CAUSES A LOW PRESSURE PROBLEM IN THE CVT. THIS MAY ALLOW THE BELT IN THE CVT TO SLIP. IF THE BELT SLIPS, YOU MAY SEE A SURGE IN RPM WHEN DRIVING AT HIGHWAY SPEEDS. IF THE BELT SLIPS LONG ENOUGH, THE TRANSMISSION WILL BE DAMAGED, AND DTC P1890 WILL SET.
A160532016-12-13. Service bulletin. SERVICE BULLETIN - AN INCORRECT LEARNING VALUE IN THE PCM MAY CAUSE A PRESSURE PROBLEM IN THE CVT UNDER CERTAIN DRIVING CONDITIONS, CAUSING A SURGE IN RPM BECAUSE THE CVT BELT SLIPS AT HIGHWAY SPEEDS AND EVENTUALLY SETTING DTC P1890 (CVT SPEED CONTROL SYSTEM).
ACA080320169022016-11-29. Service bulletin. DEALER MESSAGE - TODAY, AUGUST 3, 2016, AMERICAN HONDA MOTOR, CO., INC. IS ANNOUNCING A PRODUCT UPDATE FOR MODEL YEAR 2015-16 HONDA ACCORD AND CR-V VEHICLES TO ADDRESS INCORRECT CVT OPERATION AND DTC P1890. AN INCORRECT LEARNING VALUE IN THE PCM MAY CAUSE A PRESSURE PROBLEM IN THE CVT UNDER CERTAIN DRIVING CONDITIONS CAUSING A SURGE IN RPM BECAUSE THE CVT BELT SLIPS AT HIGHWAY SPEEDS, AND WILL EVENTUALLY SET DTC P1890 (CVT SPEED CONTROL SYSTEM).
A160532016-11-25. Service bulletin. SERVICE BULLETIN - AN INCORRECT LEARNING VALUE IN THE PCM MAY CAUSE A PRESSURE PROBLEM IN THE CVT UNDER CERTAIN DRIVING CONDITIONS, CAUSING A SURGE IN RPM BECAUSE THE CVT BELT SLIPS AT HIGHWAY SPEEDS, EVENTUALLY SETTING DTC P1890 (CVT SPEED CONTROL SYSTEM). DEPENDING ON IF DTC P1890 IS SET OR NOT, UPDATE THE PGM-FI SOFTWARE OR REPLACE THE TRANSMISSION AND UPDATE THE PGM-FI SOFTWARE.

4 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.