P0A90 fault code: what it means

P0A90: Drive motor A (MG2) performance fault on a Lexus hybrid: the main drive motor is not producing the expected output. Limp mode or no drive.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

MG2 motor fault in the hybrid transmission
inverter (motor side) fault
motor cable or resolver fault

P0A90 by make

Lexus

Drive motor A (MG2) performance fault on a Lexus hybrid: the main drive motor is not producing the expected output. Limp mode or no drive.

Usual causes: MG2 motor fault in the hybrid transmission; inverter (motor side) fault; motor cable or resolver fault

Toyota

Drive motor A (MG2) performance fault: the main traction motor in the hybrid transaxle is not producing the expected output. Limp mode or no drive likely.

Usual causes: MG2 motor fault in the transaxle; inverter (MG2 side) fault; motor resolver or cable fault

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 P0A90 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.