P0A92: Hybrid Generator Performance
What to do
An engine that hardly ever switches off plus this code is as likely a battery problem as a generator one — ask for the battery report before anyone quotes on the machine. Starting trouble alongside makes the generator side more credible.
What this code means
The generator is not delivering what was commanded — the broad verdict on the machine that charges the battery and starts the engine.
The P0A90 chain argument applies, redirected by this machine's jobs: the presenting symptoms are laboured engine starts, a battery that never seems charged, and an engine that runs constantly to compensate. And the chain runs both ways here — a deteriorating battery demanding endless charge overworks a healthy generator into this code, which is the P0A3B argument arriving at the performance family.
Companion codes and a battery health report before the transaxle is opened; the generator's genuine failures announce themselves through the phase-current and resolver families more specifically than this code does.
Likely causes
Start here
- Hybrid battery pack deterioration · specialist
Less common
- Faulty power inverter · specialist
- Low or degraded transmission fluid · moderate
- Motor winding insulation breakdown · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
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