P0A37 fault code: what it means

P0A37: Generator temperature sensor range/performance on a Lexus hybrid.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

temperature sensor or wiring fault
low or old hybrid transmission fluid
inverter/MG ECU fault

P0A37 by make

Lexus

Generator temperature sensor range/performance on a Lexus hybrid.

Usual causes: temperature sensor or wiring fault; low or old hybrid transmission fluid; inverter/MG ECU fault

Toyota

Generator (MG1) temperature sensor range/performance fault. Hybrid power may be limited.

Usual causes: temperature sensor or wiring fault at the transaxle; low or old transaxle fluid; inverter/MG ECU 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
Hybrid battery new genuine (Camry / RAV4 / Kluger / Lexus)NZ$5,310–NZ$10,550 · A$5,120–A$9,890
Automatic transmission fluid service, drain and refill (car)NZ$210–NZ$470 · A$210–A$450
Automatic transmission fluid service (SUV / ute / 4WD)NZ$300–NZ$680 · A$290–A$650

Not sure what P0A37 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.