P0A92 fault code: what it means

P0A92: Hybrid generator (MG1) performance fault on a Lexus hybrid: the generator in the hybrid transmission is not doing what the ECU commands. Limp mode likely.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

MG1 fault in the hybrid transmission
inverter (generator side) fault
resolver or wiring fault

P0A92 by make

Lexus

Hybrid generator (MG1) performance fault on a Lexus hybrid: the generator in the hybrid transmission is not doing what the ECU commands. Limp mode likely.

Usual causes: MG1 fault in the hybrid transmission; inverter (generator side) fault; resolver or wiring fault

Toyota

Hybrid generator (MG1) performance fault: the generator inside the hybrid transaxle is not doing what the ECU commands. Usually Check Hybrid System light and limp mode.

Usual causes: MG1 winding or bearing fault in the transaxle; inverter (MG1 side) fault; resolver / wiring fault at the transaxle

What the repair usually costs

CVT / e-CVT replacement with remanufactured unit (hybrid SUV)NZ$9,450–NZ$12,590 · A$9,170–A$12,540
Automatic transmission rebuild, 6-speed and up (sent to specialist)NZ$7,190–NZ$13,080 · A$6,190–A$11,830
DSG / dual-clutch mechatronic unit replacement (new or reman)NZ$4,300–NZ$7,160 · A$3,750–A$6,390
DSG mechatronic repair / rebuild (unit sent to specialist)NZ$2,070–NZ$4,800 · A$1,890–A$4,250

Not sure what P0A92 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.