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Battery Overheated! Stop safely
Kia Battery Overheated! Stop safely: EV car battery overheated
Risk level
High
Professional inspection is recommended.
Urgency
Immediate
Quick answer
On a Kia EV such as the EV6, EV3 (SV1), EV9, or Niro EV, 'Battery Overheated! Stop safely' (or 'EV Battery Overheated! Stop vehicle') warns that the high-voltage battery temperature is too high. Stop in a safe location and turn off the EV or POWER button to let it cool.
Safety first
Stop and check this first
- If 'Battery Overheated! Stop safely' is still displayed even after the POWER button has been turned off for sufficient time, refrain from driving and have the vehicle inspected by an authorized Kia dealer or service partner.
- If 'Refill coolant' is displayed, stop driving immediately; also, when 'Power limited' and the Power Down Indicator Light are ON, do not accelerate suddenly and be aware that the vehicle may roll back on a slope.
Safe checks you can perform
- Stop in a safe place, turn off the EV or POWER button, and wait for the battery to cool
- Check the LCD display for 'Refill coolant' or 'Check Active Air Flap system'
- Check whether the Service Warning Light and Power Down Indicator Light illuminate together
Leave these tasks to a qualified professional
- Do not attempt this professional task: High-voltage battery thermal inspection and control system diagnosis
- Do not attempt this professional task: Inspection of the EV coolant circuit and Active Air Flap actuator
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
High-voltage battery thermal inspection and control system diagnosis
What they doThe authorized Kia dealer or service partner inspects the vehicle, reads the high-voltage battery temperature sensor data and fault codes, and determines why the warning remained active.
They must show youthe diagnostic report with high-voltage battery temperature readings and stored fault codes.
In writingthe diagnosed cause of the high-voltage battery overheating, sensor readings, and test results.
Inspection of the EV coolant circuit and Active Air Flap actuator
What they doThe technician checks the coolant level and inspects for leaks in the electrical cooling circuit, as well as testing the actuator flap and air flap controller operation.
They must show youthe verified coolant level and proper opening of the Active Air Flap with all LCD warnings cleared.
In writingthe cooling circuit or air flap repairs performed and confirmation that no overheating or coolant warnings remain.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Stop in a safe place, turn off the EV or POWER button, and wait for the battery to cool
- Who:
- you, parked safely off the roadway without opening any under-hood reservoirs.
- How:
- stop the vehicle safely, turn off the EV button (or POWER button), and wait a sufficient time for the high-voltage battery temperature to decrease.
- Result that matters:
- verify whether the high-voltage battery cools down once turned off or whether the warning stays active.
- If the warning is still displayed even after the POWER button has been turned off for sufficient time:
- refrain from driving and have the vehicle inspected by an authorized Kia dealer or service partner.
- If the warning clears after cooling down:
- avoid sudden acceleration and have an authorized Kia dealer check the thermal system if it recurs.
- Evidence to keep:
- photo of the LCD display showing 'Battery Overheated! Stop safely' and note of how long the vehicle was turned off.
Evidence: Kia EV6 owner's manual: LCD display messages for electric vehicle · Kia owner's manual SV1 2025: electric vehicle LCD display messages
Check the LCD display for 'Refill coolant' or 'Check Active Air Flap system'
- Who:
- you, reading the instrument cluster LCD messages.
- How:
- check whether the cluster also displays 'Refill coolant' or 'Check Active Air Flap system' alongside the overheating warning.
- Result that matters:
- identify whether low coolant or a stuck air flap is contributing to the high battery temperature.
- If 'Refill coolant' is displayed:
- stop driving immediately and have the vehicle inspected by an authorized Kia dealer or service partner.
- If 'Check Active Air Flap system' is displayed:
- report to the dealer that the actuator flap or controller may not be opening.
- Evidence to keep:
- photos of all companion warning messages shown on the LCD cluster.
Evidence: Kia owner's manual SV1 2025: electric vehicle LCD display messages
Check whether the Service Warning Light and Power Down Indicator Light illuminate together
- Who:
- you, looking at the instrument cluster warning lamps.
- How:
- observe whether both the Service Warning Light and the Power Down Indicator Light (turtle symbol) illuminate at the same time alongside 'Power limited'.
- Result that matters:
- distinguish protective power limiting from a confirmed system failure.
- If both the Service Warning Light and Power Down Indicator Light illuminate at the same time:
- Kia's manual confirms a failure requiring authorized inspection.
- If only the Power Down Indicator Light illuminates:
- note that the vehicle may not be driven or may roll back on a slope while the light is ON.
- Evidence to keep:
- photo of the cluster indicator lamps lit during the event.
Evidence: Kia owner's manual SV1 2025: electric vehicle LCD display messages
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Vehicles
- Brand
- Kia
- Product type
- Cars
Known code variants
- Battery Overheated! Stop safely
- EV Battery Overheated! Stop vehicle
- Kia EV battery overheated warning
- Reponer el refrigerante Kia EV
- ¡Batería sobrecalentada! Deténgase de forma segura
What it means
In the Kia EV6 and SV1 owner's manuals, this warning message is displayed to protect the battery and electric vehicle system when the high-voltage battery temperature is too high. Kia instructs you to turn off the EV button (or POWER button) and stop the vehicle so that the battery temperature decreases; if the warning is still displayed even after the POWER button has been turned off for sufficient time, refrain from driving and have the vehicle inspected by an authorized Kia dealer or service partner. The warning alone never proves which specific cooling or battery component caused the high temperature.
Warnings and stop conditions
- Highsource verified
If 'Battery Overheated! Stop safely' is still displayed even after the POWER button has been turned off for sufficient time, refrain from driving and have the vehicle inspected by an authorized Kia dealer or service partner.
Evidence: Kia EV6 owner's manual: LCD display messages for electric vehicle · Kia owner's manual SV1 2025: electric vehicle LCD display messages
- Highsource verified
If 'Refill coolant' is displayed, stop driving immediately; also, when 'Power limited' and the Power Down Indicator Light are ON, do not accelerate suddenly and be aware that the vehicle may roll back on a slope.
Evidence: Kia owner's manual SV1 2025: electric vehicle LCD display messages
Symptoms and causes
Probable causes · in order
- High-voltage battery temperature exceeding safe operating limitsCommon
Kia's owner's manual states that this warning message is displayed to protect the battery and electric vehicle system when the high-voltage battery temperature is too high.
Evidence: Kia EV6 owner's manual: LCD display messages for electric vehicle · Kia owner's manual SV1 2025: electric vehicle LCD display messages
- Low coolant level in the EV cooling system ('Refill coolant')Possible
When the coolant is low, the cluster displays 'Refill coolant'; driving with low coolant for a prolonged period can cause serious problems with the vehicle's electrical equipment and make normal driving impossible.
Evidence: Kia owner's manual SV1 2025: electric vehicle LCD display messages · Kia manual del propietario SV1 2025: mensajes en la pantalla LCD del vehículo eléctrico
- Malfunction in the Active Air Flap system ('Check Active Air Flap system')Possible
A malfunction with the actuator flap or actuator air flap controller, or an air flap that does not open, restricts cooling airflow and triggers its cluster warning message.
Evidence: Kia owner's manual SV1 2025: electric vehicle LCD display messages · Kia manual del propietario SV1 2025: mensajes en la pantalla LCD del vehículo eléctrico
Virtual technician
Does Battery Overheated! Stop safely still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Kia EV6 owner's manual: LCD display messages for electric vehicle
Kia India · 2025 · manual
- 2
Kia owner's manual SV1 2025: electric vehicle LCD display messages
Kia Corporation · 2025 · manual
- 3
Kia manual del propietario SV1 2025: mensajes en la pantalla LCD del vehículo eléctrico
Kia Corporation · 2025 · manual
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