Sonata Hybrid no READY: power-relay/safety-plug diagnosis. 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 Hyundai original: Sonata Hybrid safety plug / power relay assembly diagnosis · Check open recalls by VIN at NHTSA Source date: 2023-06; research checked: 2026-11-01.
What prompted this manufacturer document
- No READY, no propulsion or hybrid stop warnings can lead to a safety-plug/power-relay diagnostic branch rather than immediate battery replacement.
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.
- Hyundai Sonata Hybrid · 2011, 2012, 2013, 2014, 2015 · YF hybrid
- 2013-2015 vehicles need an open Service Campaign 994 check before proceeding.
- The source contains an incomplete related bulletin number; do not fabricate it.
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 |
|---|---|---|
| P0A0D | P0A0D | High-voltage interlock circuit-high indication in this Hyundai application. |
| P1B25 | P1B25 | High-voltage path fault in the cited Hyundai application. |
| P1B76 | P1B76 | High-voltage relay fault in this application. |
| P1B77 | P1B77 | High-voltage precharge fault in this application. |
What an owner can record safely
- Photograph the exact stop message and report whether READY appears.
What the source does not prove
- Do not remove the HV safety plug, fuse or orange-cable connectors.
- 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
- Was the campaign checked, and was a plug/relay fault excluded before recommending a battery?
- 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?
Open source-review issue
- Q2-006: A campaign 994 cross-reference has an incomplete 23-01-XXXH document number. Check the campaign by VIN; no completed bulletin number or coverage decision is inferred.
The uncertain field is not used here to claim a current fitment, repair or market-wide failure.
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
- Hyundai — Sonata Hybrid safety plug / power relay assembly diagnosis (23-HC-001H) Document: 2023-06 · 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.