P148FElectric coolant pump running too fast

• Toyota/Lexus code · Engine
• Turns on the check-engine light

How the car detects it

The electric engine coolant pump on Toyota hybrids spins faster than it should, which can happen when it pumps air because the coolant level is low. On 2016-2019 Prius and Prius Prime, Toyota traced this to a coolant leak at the exhaust heat exchanger. Check the coolant level only with the engine cold.

What you may notice

• Check-engine light
• Low coolant level
• Poor cabin heating

Likely causes

• PossibleLow coolant level or a coolant leak
• RareAir in the cooling system after a repair
• RareCoolant pump

Sources

• static.nhtsa.gov › MC-10166037-9999.pdf · official document
• toyota-club.net › ems_1nzfxe.htm
• toyota-club.net › ems_2zrfxe.htm

Backed by an official manufacturer document.

From Obdaryn's Toyota/Lexus pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.