Nissan Leaf (2010-2017) Won’t Start & EV System Warning
Do you have a Nissan Leaf with intermittent EV system warnings and no restart?
Don’t ignore it – book a diagnostic today and get expert help.
Intermittent EV system warnings
No restart displayed on instrument panel
Vehicle failing to start after being switched off
The following fault code(s) may be present
P0aa6 – HV battery system insulation
Affected Vehicles
Nissan Leaf
- Nissan Leaf 2010
- Nissan Leaf 2011
- Nissan Leaf 2012
- Nissan Leaf 2013
- Nissan Leaf 2014
- Nissan Leaf 2015
- Nissan Leaf 2016
- Nissan Leaf 2017
Nissan Leaf E Plus Tekna
- Nissan Leaf E Plus Tekna 2010
- Nissan Leaf E Plus Tekna 2011
- Nissan Leaf E Plus Tekna 2012
- Nissan Leaf E Plus Tekna 2013
- Nissan Leaf E Plus Tekna 2014
- Nissan Leaf E Plus Tekna 2015
- Nissan Leaf E Plus Tekna 2016
- Nissan Leaf E Plus Tekna 2017
Common Failure Symptoms
- Intermittent warnings for EV system displayed
- No restart message on instrument panel
- Vehicle refuses to power up after shutdown
- High voltage system isolation warnings
Do you have a Nissan Leaf with intermittent EV system warnings and no restart?
Don’t ignore it – book a diagnostic today and get expert help.
Nissan Leaf Diagnostic Report
Initially, the Nissan Leaf presented with an isolation fault previously checked at the dealer. The customer sought our expertise for repair solutions. We conducted a comprehensive inspection to verify the complaint, confirming low insulation between the high voltage system and vehicle body.
- Fault code P0aa6 identified indicating HV battery system insulation failure
- Systematic testing pinpointed the leakage source internal to the battery pack
- Battery pack removed and stripped down for detailed module-level diagnostics
Nissan Leaf Repairs
First, we removed the high voltage battery pack from the vehicle and placed it on our specialist workbench for detailed examination.
Next, we conducted systematic voltage leakage testing on individual modules. Testing revealed two modules had failed, allowing voltage to leak to the vehicle body.
Finally, we sourced, prepared and installed two replacement modules according to manufacturer specifications. The battery pack was reassembled and reinstalled.
- Battery pack removal and systematic disassembly completed
- Module-level diagnostics identified two failed modules leaking voltage
- Replacement modules sourced, installed and battery reassembled to specification
Resolution
Following module replacement and battery reassembly, comprehensive post-repair verification confirmed successful resolution:
- Vehicle successfully repaired with full operational capability restored
- Fault code P0aa6 cleared with no return after testing cycles
- High voltage system insulation restored to within manufacturer parameters
- Complete functionality check verified all EV systems operating correctly
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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