Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1890CVT SPEED CONTROL SYSTEM
Manufacturer communications
8Original wording in English
NISSAN
PERMANENT DTC SET IN TCM AND WILL NOT ERASE IF YOU CONFIRM One or more of the following DTCs are stored in the permanent DTC screen (Figure 1): P1890, P2768, P17F3, P17F4, P188F And The DTCs will not erase when following the ESM procedure. NOTE: ï‚· If DTCs other than those listed above are stored, this bulletin does not apply. …
HONDA
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.
HONDA
"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 SET DTC P1890 (CVT SPEED CONTROL SYSTEM). SOME 2015 CR-V’S THAT HAD A PREVIOUS VERSION OF VIBRATION SOFTWARE WILL…
HONDA
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).
Check vehicle applicability
7A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Transmission 4WD Mode Select Return Input Circuit Failure
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.