Practical checks and shop questions for High-voltage, charging isolation and propulsion alerts; save evidence before replacing parts.
This is a non-invasive owner checklist, not an OEM repair procedure or permission to drive.
This reference supports the stated topic only. Model, model year, equipment, current rule or individual vehicle conditions may differ; check the original source before acting.
Read the NHTSA original: Electric and hybrid vehicle safety Source date: document date not recorded; research checked: 2026-11-01.
Codes in this diagnostic topic
These codes share a system-level checklist, but their distinct numbers and meanings are shown below. A code here does not prove a particular vehicle has every listed fault. Use the exact code row and full scan.
| Code | Meaning | Vehicle scope |
|---|---|---|
| P1A9096 | ICCU fault identifier used in recall diagnostics | Hyundai |
Save the evidence first
- Exact alert ID and text
- Whether the car can shift/drive/charge
- Impact/flood/heat/smell symptoms
- Battery state of charge and software version
Safe owner checks
- Follow any do-not-charge or stop-driving instruction.
- Do not touch orange cables, the traction battery or exposed/damaged electrical components.
- For fire/smoke or a dangerous situation, move to safety and contact emergency help.
Questions for a qualified technician
- Does the fault need isolation testing, battery/ICCU inspection or charging-site electrical work?
- What towing method is approved for this exact vehicle?
Common wrong turns
- Do not jump a traction battery.
- A generic scanner or household meter does not make HV work safe.
Confirm the repair
- Qualified EV personnel must confirm safe operation and charging after repair.
Sources and scope
- NHTSA — Electric and hybrid vehicle safety Document: date not recorded · Research checked: 2026-11-01
- Tesla — Troubleshooting alerts — 2020–2024 Model Y Document: date not recorded · Research checked: 2026-11-01
- Hyundai — Recall 272, TSB 24-01-086H-1 / NHTSA 24V868 Document: 2024-12 · 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.