- Vehicles
- Cars
Fault in the high voltage system
CUPRA Born 'Fault in the high voltage system' in EV car
Risk level
High
Professional inspection is recommended.
Urgency
Immediate
Quick answer
If your CUPRA Born lights up a red high-voltage warning ('The electrical system is not working properly. Stop safely!') or 'Electric drive system overheated', park outdoors as soon as it is safe, switch off the drive system, do not drive on, and call professional assistance.
Safety first
Stop and check this first
- Never continue driving your CUPRA Born with a red high-voltage system or overheated electric drive warning lamp: park safely outdoors as soon as possible, switch off the drive system, do not top up coolant, and call professional assistance.
- Never touch, modify or open orange high-voltage cables, the high-voltage battery cover or any high-voltage component: they can remain live even when the ignition is off and cause severe burns or fatal electric shock.
Safe checks you can perform
- Check in the Digital Cockpit whether the lamp is red or yellow
- With a red lamp, park outdoors and switch off the drive system
- Do not attempt to charge the high-voltage battery with a red fault
Leave these tasks to a qualified professional
- Do not attempt this professional task: Diagnostic readout of the electric drive and high-voltage control units
- Do not attempt this professional task: High-voltage system repair after de-energising the network
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.
Diagnostic readout of the electric drive and high-voltage control units
What they doA specialised CUPRA workshop reads the fault memory and live parameters of the electric drive, high-voltage battery and thermal management control units.
They must show youthe complete diagnostic fault report and the recorded high-voltage status parameters.
In writingthe stored fault codes, the affected high-voltage or drive subsystem and the tests performed.
High-voltage system repair after de-energising the network
What they doQualified high-voltage technicians disconnect the high-voltage supply in accordance with CUPRA guidelines and repair or replace the faulty drive, battery or cooling component.
They must show youthe post-repair insulation and thermal test results and the Digital Cockpit clear of red or yellow lamps.
In writingthe high-voltage or cooling parts repaired or replaced and confirmation that charging and drive functions passed workshop testing.
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.
Check in the Digital Cockpit whether the lamp is red or yellow
- Who:
- you, looking at the CUPRA Born digital instrument cluster.
- How:
- verify immediately whether the symbol is red ('Stop safely!' / 'Stop the vehicle immediately!') or yellow ('Fault in the electric drive system or the high-voltage on-board network').
- Result that matters:
- applying the exact safety action specified in the CUPRA Born owner's manual for that warning level.
- If the warning lamp is red:
- stop as soon as it is safe, do not continue driving, switch off the drive system and seek professional assistance.
- If the control lamp is yellow:
- the manual calls for an immediate specialised workshop visit, but ErrorBase advises stopping in a safe place, switching off and arranging assistance rather than driving on.
- Evidence to keep:
- a photo of the Digital Cockpit warning lamp and message taken once the car is safely stationary.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
With a red lamp, park outdoors and switch off the drive system
- Who:
- you, without touching orange high-voltage cables or opening coolant caps.
- How:
- park the CUPRA Born in a safe place outdoors as soon as it is possible and safe to do so, engage the electronic parking brake P and switch off the drive system.
- Result that matters:
- following CUPRA's mandatory outdoor parking and shutdown steps for a high-voltage fault or overheated drive unit.
- If the message reports 'Electric drive system overheated':
- do not top up coolant under any circumstances and wait for specialist assistance.
- If the cluster also shows 'HV battery:
- Risk of fire! Park safely and evacuate immediately. Rescue team!' with a continuous audio warning: stop outdoors away from buildings or covered car parks, leave the key on the dash panel, move all occupants behind a barrier and call the fire department.
- Evidence to keep:
- the outdoor location where the vehicle is parked and the time the drive system was switched off.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
Do not attempt to charge the high-voltage battery with a red fault
- Who:
- you, while waiting for recovery or specialist assistance.
- How:
- leave the charging flap closed and do not connect an AC or DC charging cable when the red high-voltage warning is active.
- Result that matters:
- respecting the manual's statement that it is not possible to charge the high-voltage battery during a high-voltage system fault.
- If the alert appeared near a charging point:
- keep the vehicle unplugged and contact an authorised CUPRA or SEAT service partner.
- If the car recently struck an obstacle or suffered an underbody impact:
- inform the workshop, as the manual requires qualified personnel to inspect the high-voltage battery after any collision.
- Evidence to keep:
- a note of whether the fault appeared while driving or before starting, plus any recent impact details.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
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
- Cupra
- Product type
- Cars
Known code variants
- Avería en el sistema de alto voltaje
- Avería en el sistema de propulsión eléctrica
- CUPRA Born red electrical system warning lamp
- El sistema eléctrico no funciona correctamente. ¡Deténgase de forma segura!
- Electric drive system overheated
- Fault in the electric drive system
- Fault in the high voltage system
- Sistema de propulsión eléctrica sobrecalentado
- testigo rojo sistema eléctrico CUPRA Born
- The electrical system is not working properly. Stop safely!
What it means
In the CUPRA Born owner's manual (edition 06/23), high-voltage and electric drive warnings in the Digital Cockpit depend on lamp colour. A red warning lamp ('The electrical system is not working properly. Stop safely!' or 'Electric drive system overheated') warns that high-voltage parts may be damaged or the drive has overheated, the battery cannot be charged, and you must park safely outdoors, switch off the drive system and call professional assistance. A yellow lamp ('Fault in the electric drive system or the high-voltage on-board network') needs a specialised workshop at once, so stop safely and arrange assistance. The symbol alone does not show which component failed.
Warnings and stop conditions
- Highsource verified
Never continue driving your CUPRA Born with a red high-voltage system or overheated electric drive warning lamp: park safely outdoors as soon as possible, switch off the drive system, do not top up coolant, and call professional assistance.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
- Highsource verified
Never touch, modify or open orange high-voltage cables, the high-voltage battery cover or any high-voltage component: they can remain live even when the ignition is off and cause severe burns or fatal electric shock.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
Symptoms and causes
Probable causes · in order
- High-voltage system fault with possible component damage (red warning lamp)Common
The CUPRA Born manual states that the red lamp with 'The electrical system is not working properly. Stop safely!' indicates a fault in the high-voltage system where high-voltage components may be damaged and charging is impossible.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
- Overheated electric drive system (red warning lamp)Possible
When the red warning lamp appears with 'Electric drive system overheated' in the Digital Cockpit, the electric drive has exceeded its temperature limit and CUPRA instructs you not to top up coolant.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
- Fault in the electric drive system or high-voltage on-board network (yellow lamp)Possible
When the control lamp lights up yellow with a Digital Cockpit message, there is a fault in the electric drive system or high-voltage on-board network requiring an immediate visit to a specialised workshop.
Evidence: CUPRA Born Owner's Manual edition 06/23 (EN)
Virtual technician
Does Fault in the high voltage system 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
CUPRA Born Owner's Manual edition 06/23 (EN)
CUPRA (SEAT S.A.) · 2023 · manual
- 2
CUPRA Born Manual de instrucciones edición 06/23 (ES)
CUPRA (SEAT S.A.) · 2023 · manual
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