Electric Mini Countryman HV Warning Light On
Have you got an electric Mini Countryman HV warning light on?
Don’t ignore it – book a diagnostic today and get expert help.
The following fault code(s) may be present
21F125 High-voltage battery, cell supervision circuit 4: overvoltage (at least one cell)
21F136 High-voltage battery, cell supervision circuit 4: undervoltage (at least one cell)
Affected Vehicles
Mini Countryman
- All years
Common Failure Symptoms
- Dashboard shows the HV warning light and the vehicle will not enter “Ready” mode or will not accept full electric drive
- Fault codes for high-voltage battery cell supervision circuits (over- and under-voltage) are logged
- High-voltage battery pack inspection reveals a faulty Cell Supervision Circuit (CSC) module associated with a specific cell block
- The vehicle may be plugged in but will not charge or will transition into petrol-only if hybrid or start in EV mode is disabled
Have you got an electric Mini Countryman HV warning light on?
Don’t ignore it – book a diagnostic today and get expert help.
Mini Countryman Diagnostic Report
Mini Countryman Repairs
Resolution
Need Help?
Are you an independent garage, dealership, warranty, fleet or insurance business?
Specialist Support for EV & Hybrid Repairs
We partner directly with independent garages, dealerships, warranty and fleet providers, and insurance companies across the UK to resolve complex EV and hybrid vehicle issues.
If your customer’s vehicle is displaying battery or electrical faults, we offer advanced diagnostics and expert repair solutions that go far beyond simple parts replacement.
Our battery and component repair service includes:
- Nationwide collection and delivery
- Rapid turnaround times
- Comprehensive technical support
Let us help you keep your customers on the road, while enhancing the value and reputation of your services.
Click below to find out how we can support you.
Is the vehicle owned by you or your business?
Have you been advised the battery or component needs replacing on your vehicle?
Before committing to a costly full replacement, talk to us. At LKQ Electriq, we specialise in inspecting, diagnosing and repairing complex battery and component faults (issues that many main dealers won’t touch).
Our expert repair service can restore your Range Rover’s hybrid battery at a fraction of the cost of replacement. We offer:
- Nationwide collection and delivery
- Transparent, honest assessments
- Specialist repairs backed by technical expertise
We’ve helped customers across the country save thousands. Book a diagnostic today and discover how we can help you get back on the road, without breaking the bank.
Click below to find out how we can support you.
Do Cedar Electric repairs have a warranty?
High Voltage System Repairs
Repairs involving high voltage systems typically include a 12-month, unlimited mileage warranty, offering you complete peace of mind.*
Lifetime Guarantee
All work carried out at Cedar Garage is backed by our lifetime workmanship guarantee.
*Terms and conditions apply. Please consult a Service Advisor to confirm the specific warranty details for your vehicle prior to booking.
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