Honda CVT P1890: software-only versus transmission repair. See the manufacturer document, vehicle conditions, exclusions and questions for a qualified shop before assuming a repair.
This is a research summary of a manufacturer communication, not a diagnosis for your car, a DIY repair procedure or confirmation of warranty or recall eligibility. No qualified technician has approved a repair for your individual vehicle here.
This historical communication is conditional. The current revision, VIN/build eligibility, measured diagnosis and any warranty or recall decision are not established here. Ask the manufacturer or a qualified shop to check the complete current document.
Read the American Honda original: Accord/CR-V CVT software product update and P1890 branch · Check open recalls by VIN at NHTSA Source date: 2016-08-03; research checked: 2026-11-01.
What prompted this manufacturer document
- Incorrect PCM learning can affect CVT pressure and lead to belt slip or highway-speed RPM surging.
Which vehicle conditions must be checked
Each row below retains its own conditions. Do not combine engines, years or models across rows to create new applications. A listed model is not proof that a particular VIN is affected.
- Honda Accord · 2015, 2016 · CVT
- Honda CR-V · 2015, 2016 · CVT
- Use the VIN-specific product-update path; some 2015 CR-Vs have a separate prior-vibration-update branch.
Codes recorded in this document
A root listed only as an appearance has no separately verified meaning here. Preserve every suffix and module name; a shared root does not transfer a repair branch to another vehicle.
| Root | Raw form | Meaning in this source, if established |
|---|---|---|
| P1890 | P1890 | CVT speed-control fault in the cited Honda communication. |
What an owner can record safely
- Record RPM surging and prior dealer software work without reproducing it at speed.
What the source does not prove
- Do not assume clearing the code restores damaged belt hardware.
- A code or message alone does not establish a failed part, a safe-to-drive decision or an approved repair for this VIN.
- A service bulletin is not automatically a recall or free warranty repair. Confirm current eligibility directly.
Questions for the repair shop
- Which product-update branch applies, and is P1890 actually present?
- Does a later revision or a current recall change the source's original advice?
- What measurement or inspection confirms the cause, and how will the repair be verified?
Read the original record
The linked communication may be revised after the research date. Compare its document number, exact vehicle table, diagnostic preconditions and exclusions with a qualified technician. This page paraphrases selected facts and does not reproduce the manufacturer procedure.
Sources and scope
- American Honda — Accord/CR-V CVT software product update and P1890 branch (Dealer communication: 16-053 / 16-057) Document: 2016-08-03 · Research checked: 2026-11-01
Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.