Skip to content
Diagnosing fault code P0A93 on a hybrid vehicle

Inverter

P0A93 — Inverter Cooling System Performance

The inverter is running hotter than it should. This is a code worth taking seriously because sustained inverter overheating can damage power electronics that are far more expensive than a cooling repair.

  • SeverityNeeds attention
  • SystemInverter
  • Commonly seen onToyota Prius, Toyota Aqua, Lexus CT200h
  • What it usually costsUsually a modest repair. Pump replacement is a fraction of what failed power electronics would cost if the fault is ignored.

Symptoms you may notice

  • Coolant level dropping with no obvious external leak
  • Whining or grinding from the inverter coolant pump
  • Power derating or reduced output once the car is warm
  • Often accompanied by hybrid battery performance complaints

Usual causes

  • Failing inverter coolant pump — extremely common on ageing Prius models
  • Low or degraded coolant
  • Blocked radiator or debris in the cooling stack
  • Air in the cooling circuit after an incomplete bleed

What we actually do

  • Verify pump operation and flow rather than replacing it on suspicion
  • Pressure test the cooling circuit to find where coolant is actually going
  • Replace the pump, coolant and any blocked components where required
  • Bleed the circuit properly and confirm temperatures stay in range on a road test

Vehicles we see this on

P0A93 in Pakistan

  • Toyota Prius
  • Toyota Aqua
  • Lexus CT200h
  • Toyota Camry Hybrid

If your car is storing P0A93 and you are unsure what to do next, send us the full scan output rather than just this one code. The surrounding readings usually tell us far more than the code on its own.

Questions

Related questions we answer often

Got P0A93 showing? Let us take a look.

Send us the code and the symptoms on WhatsApp. We will tell you what it usually means on your model and roughly what it costs before you bring the car in.

  • Shop 1, Ground Floor, Plot 36-C, 21st Commercial Street, D.H.A Phase 2, Karachi, Pakistan
  • Monday – Saturday: 8:00 am – 10:30 pm
    Sunday: Closed
  • Doorstep service across Karachi. Batch visits to Rawalpindi, Islamabad, Lahore and Peshawar.
  • +92 308 8140743