P0A7A code meaning
Generator Inverter Performance
Powertrain system Generic code P0Axx codes Check engine light
What P0A7A means
P0A7A reports that the inverter stage driving the generator has signalled a fault, for example overcurrent or a failed power switch. Toyota uses the code across its hybrids and splits it with information codes. Bulletin T-SB-0142-16 covers 2012-2016 Avalon, Camry and RAV4 Hybrid with MIL on and P0A7A plus information code 122, a generator inverter fail signal caused by overcurrent; the repair replaces inverter and transaxle. A Toyota field report filed with NHTSA describes a 2006 Highlander Hybrid with P0A7A sub code 325, master warning, MIL and Check Hybrid System, traced to a fault inside the inverter assembly. P0A78 and P0A79 are the drive motor inverters, P0A3E generator inverter overheating, P0A92 generator performance.
P0A7A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor2 to 10 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0A7A
- MIL, master warning and Check Hybrid System message
- Reduced power or vehicle will not enter ready mode
Common causes of P0A7A
- Most likelyInternal generator inverter fault with overcurrent (Toyota information code 122)
- Most likelyInverter assembly defective
- PossibleFault in the generator inside the transaxle
- Less likelyInsufficient inverter cooling stressing the power stage
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Generator inverterHybrid control module
What each part of P0A7A 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. |
| 7A | The exact fault in that area. |
What to do next
- Note P0A7A 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 P0A7A
What does P0A7A mean?
P0A7A means "Generator Inverter Performance". P0A7A reports that the inverter stage driving the generator has signalled a fault, for example overcurrent or a failed power switch. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A7A?
Drive gently and only to a workshop. With P0A7A the car can go into limp mode (reduced power) to protect itself.
Will P0A7A fail an emissions test?
Yes, it can. P0A7A 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 P0A7A to fix?
Difficulty: workshop only. A typical repair takes 2 to 10 hours of work. This is a job for a workshop.
Will P0A7A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.