Mobile EV Inverter / MCU / PCU Fault Repair London | FixAnyEV

⚡ EV Inverter / Motor Control Unit (MCU / PCU) Fault Repair in London

Fast, Mobile Diagnostics for EV Inverter & Motor Control Faults

The inverter (also known as the Motor Control Unit or Power Control Unit) is the heart of your EV’s drive system. It converts DC battery power into AC power for the motor and controls torque, speed, regenerative braking, and thermal management. When the inverter or MCU/PCU develops a fault, the EV may refuse to start, lose power, enter limp mode, or shut down completely.

FixAnyEV provides advanced mobile diagnostics for inverter and MCU/PCU faults anywhere in London.

📞 Call 07779 836 677 for immediate assistance.

⚠️ Inverter faults can cause sudden loss of drive. ⚠️ Never continue driving if your EV shows inverter or motor control warnings. ⚠️ Inverters contain high‑voltage components — do not attempt DIY repairs.

🔍 Common Inverter / MCU / PCU Faults We Repair

⚡ Inverter Over‑Temperature

  • Cooling system failure
  • Blocked coolant channels
  • Failed pump or valve
  • Thermal derating (reduced power)

⚡ IGBT / Power Module Failure

  • Sudden shutdown
  • Harsh juddering
  • No drive
  • “Electrical System Fault”

⚡ DC‑DC Conversion Fault

  • 12V system not charging
  • EV won’t start
  • Multiple system warnings

⚡ Phase Current Sensor Fault

  • Incorrect torque output
  • Harsh acceleration
  • Regenerative braking issues

⚡ Motor Resolver / Position Sensor Fault

  • EV won’t enter “Ready”
  • Jerky movement
  • Incorrect motor timing

⚡ Inverter‑Side Isolation Fault

  • HV leakage inside the inverter
  • Charging refusal
  • Immediate shutdown

⚡ CAN Communication Fault

  • No communication with BMS
  • No torque request
  • “Drive System Fault”

⚡ Cooling Plate / Power Stage Failure

  • Overheating
  • Reduced power
  • Inverter lockout

📞 Call 07779 836 677 if your EV shows any of these symptoms.

🚗 Symptoms of Inverter / MCU / PCU Failure

  • “Drive System Fault”
  • “Electrical System Fault”
  • EV won’t enter Ready mode
  • No drive or sudden loss of power
  • Harsh juddering or vibration
  • Reduced acceleration
  • Regenerative braking not working
  • Overheating warnings
  • Charging stops immediately

⚠️ Inverter faults can cause dangerous loss of propulsion.

🛠️ Our Inverter / MCU / PCU Diagnostic Process

  1. Full EV‑specific scan – inverter, MCU/PCU, BMS, motor and HVJB
  2. Live data analysis – phase currents, torque request, temperatures
  3. Isolation testing – detect HV leakage inside inverter
  4. Cooling system testing – pumps, valves, coolant flow
  5. Motor resolver and sensor testing
  6. CAN communication verification
  7. On‑site repair or safe workaround

⚠️ Inverters are locked and security‑protected on most EVs — specialist access required.

🔒 Locked & Security‑Protected on Most EVs

Inverter and MCU/PCU systems are security‑protected and cannot be accessed with standard garage tools.

FixAnyEV uses EV‑specific diagnostic equipment to safely access:

  • Inverter control logic
  • Torque request pathways
  • Power module data
  • Resolver and phase current sensors
  • HV activation sequences

📞 Call 07779 836 677 for secure HV diagnostics.

🌍 Areas We Cover in London

We cover all London boroughs, including:

  • Croydon, Bromley, Lewisham
  • Camden, Islington, Hackney
  • Ealing, Brent, Hillingdon
  • Kingston, Richmond, Sutton
  • Central, North, South, East and West London

⭐ Why EV Owners Choose FixAnyEV

  • High‑voltage certified technician
  • EV‑specific inverter diagnostics
  • Mobile service across London
  • Faster and more accurate than dealerships
  • Trusted by EV owners, traders, fleets and dealers

📞 Book now: 07779 836 677

📞 Book Your EV Inverter / MCU / PCU Repair

If your EV shows inverter, drive system or motor control warnings, FixAnyEV brings expert diagnostics and repair directly to you.

⚠️ Stop driving immediately if the EV loses power or enters limp mode.

📞 Call 07779 836 677 to book your mobile EV repair.