Toyota Prius Inverter Fault (P0A94) Repair in London
The P0A94 fault usually relates to inverter cooling failure or internal inverter damage. We diagnose and repair properly – not guesswork or full-unit replacement charges.
Symptoms of P0A94 Prius Inverter Fault
- Red Triangle / Hybrid System Warning
- Car loses power or goes into limp mode
- Cooling pump running constantly or not running at all
- Diagnostic code: P0A94 “Inverter Performance”
Root Causes We Fix
- Failed inverter cooling pump
- Air in cooling system / coolant circulation failure
- IGBT transistor failure inside inverter assembly
- Overheating due to blocked coolant flow
What We Do
- Full hybrid diagnostic scan – not just code reading
- Inverter coolant flow + pump test
- IGBT & gate driver inspection (repairable – we don’t just replace whole unit)
- Coolant flush & bleed to restore safe temps
- Road test validation under high load
Book Repair / Diagnosis
Need it Sorted Today?
We cover all London postcodes with same-day callouts when available.