P0A93 code meaning
Inverter A Cooling System Performance
Powertrain system Generic code P0Axx codes Check engine light
What P0A93 means
The power inverter of a hybrid has its own coolant circuit with an electric pump, radiator and fan, separate from engine cooling. P0A93 is set when this circuit does not cool as intended. CARB lists inverter thermal management among the components that hybrid OBD must monitor. Hyundai documents the code for the 2011 Sonata Hybrid (bulletin 14-HC-001), assigning it, like P0C73, to the electric water pump; symptoms include a hybrid warning, no EV mode and poor acceleration. Toyota recalled 2004–2009 Prius models (12V-536) because the inverter water pump could fail and cause a stall; that notice does not name a code. A leaking or air-locked circuit should also be checked.
P0A93 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0A93
- Hybrid system warning and MIL
- No EV mode, reduced power
- Vehicle may not start or may stall
Common causes of P0A93
- Most likelyElectric inverter coolant pump failed or seized
- PossibleLow coolant or air in the inverter circuit
- PossiblePump wiring, fuse or relay fault
- Less likelyRadiator fan not running or radiator blocked
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Inverter cooling system
What each part of P0A93 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A | Area: hybrid propulsion. |
| 93 | The exact fault in that area. |
What to do next
- Note P0A93 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0A93
What does P0A93 mean?
P0A93 means "Inverter A Cooling System Performance". The power inverter of a hybrid has its own coolant circuit with an electric pump, radiator and fan, separate from engine cooling. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A93?
Drive gently and only to a workshop. With P0A93 the car can go into limp mode (reduced power) to protect itself.
Will P0A93 fail an emissions test?
Yes, it can. P0A93 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0A93 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0A93 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.