Do the dashboard and interior electrical systems power on normally?
This separates a broad low-voltage/power symptom from a vehicle that has normal accessory power.
CARFACTBOOK / DIAGNOSTIC REFERENCE
Start with the symptom. Follow the evidence.
Choose a symptom and your exact chassis when possible. Each next check follows the result you record—not a guessed failed part. CarFactBook keeps a traceable path and prepares a practical mechanic handoff.
Symptom first
What are you seeing?
Electrical
Won't start / hard starting
Check reviewed reports for Nissan Note e-POWER HE12.
ElectricalWarning light or message
Check reviewed reports for Nissan Note e-POWER HE12.
CoolingOverheating / running hot
Check reviewed reports for Nissan Note e-POWER HE12.
A/C / climateA/C not cold
Check reviewed reports for Nissan Note e-POWER HE12.
Suspension / steeringVibration / shaking
Check reviewed reports for Nissan Note e-POWER HE12.
BrakesBrake problem
Check reviewed reports for Nissan Note e-POWER HE12.
Hybrid / EV systemHybrid-system problem
Check reviewed reports for Nissan Note e-POWER HE12.
Fuel / emissionsPoor fuel economy
Check reviewed reports for Nissan Note e-POWER HE12.
Choose an exact vehicle
Selected: Nissan Note e-POWER HE12 · 2016–2020
Diagnostics v3 · Structured symptom flow
0 results recordedWon't start / hard starting — structured test-result path
Mechanic handoff summary
Further evidence required. 0 reachable results recorded.
Results stay on this page until you leave or change vehicle/symptom. Optional saving stores only this v3 session on this browser, separate from Garage and Vehicle Passport. It is not uploaded or shared. References are refreshed from CarFactBook when you return.
Preparing Diagnostics v3 handoff…
After a mechanic checks or repairs the car
Close the loop with the actual diagnosis, repair, part, cost and follow-up. The exact vehicle, symptom area and the test-result path above are prefilled, but you can edit them before submitting.
Choose an exact vehicle above to prepare a repair-outcome report.Reports remain pending until CarFactBook reviews them. A diagnostic path or external test result never becomes a confirmed diagnosis automatically.Useful references for your exact car
These references relate to the selected symptom. They do not identify a faulty component or recommend replacing it. Confirm equipment, production period and source caveats for your individual car.
Verified facts
12V battery →
LN2 60Ah on most HE12 e-POWER grades; LN1 50Ah on e-POWER SBattery fitment varies by grade and equipment. Match the grade and production date before purchasing a replacement.
Nissan Motor Co. · Verified 2026-09-27
Key fob battery →
CR2025Nissan Motor Co. · Verified 2026-09-27
Step-by-step guides
Nissan Note e-POWER HE12 Key-Fob Battery Replacement →
Manufacturer-referenced Nissan Note e-POWER HE12 intelligent-key CR2025 replacement procedure. Confirm intelligent-key type before opening.
Easy · 5–10 minutes
Intelligent key CR2025 is different from the remote-entry key CR1620. Nissan specifies the CR2025 positive (+) side DOWN. Wrap the opening screwdriver in a cloth and do not insert it deeply; internal circuits may be damaged. Do not force the cover. Keep button cells and loose parts away from children.
Nissan Note e-POWER HE12: Choose LN1 or LN2 12V Battery →
Nissan's official HE12 12V battery chart distinguishes LN1 50Ah for e-POWER S equipment from LN2 60Ah for most other e-POWER grades. Identify the exact model year and equipment before buying.
Easy · 5–10 minutes to check equipment
Battery-selection reference only—not instructions for disconnecting or replacing a vehicle battery. Confirm grade, production date, equipment, case dimensions and fitting against Nissan's current parts data and the existing battery. Hybrid high-voltage components require special precautions.
Maintenance
Documented service references; your service history determines what is due.
Key fob battery replacement
Condition basedUse a CR2025 battery for the documented Nissan Intelligent Key / key-fob reference.
Confirm key type before replacement.
Nissan Japan FAQ ↗ · Verified 2026-10-02
Parts / fitment
Reference specifications, not a shopping list or proof that these parts need replacement. Fitment conditions still apply.
12V battery
LN2 60Ah on most HE12 e-POWER grades; LN1 50Ah on e-POWER SBattery fitment varies by grade and equipment. Match the grade and production date before purchasing a replacement.
Nissan Motor Co. source ↗ · Verified 2026-09-27
Key fob battery
CR2025Applicability follows the exact model/chassis code and configuration stated by the manufacturer source.
Nissan Motor Co. source ↗ · Verified 2026-09-27
Reviewed repair evidence
0 related reportsWon't start / hard starting
Reports are matched by related system category for Nissan Note e-POWER HE12. Compare the recorded symptom and outcome; a repair on another car does not diagnose yours.
No reviewed match yet. CarFactBook will not manufacture a likely cause just to fill this screen. Check the exact vehicle facts or contribute a real repair outcome through Problems.