P148F fault code: what it means

P148F: Engine coolant pump over-revolution on Lexus CT200h/IS300h-type hybrids: the electric water pump is spinning too fast, usually running dry.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

low coolant or air lock after a coolant change
coolant leak
failing electric water pump

P148F by make

Lexus

Engine coolant pump over-revolution on Lexus CT200h/IS300h-type hybrids: the electric water pump is spinning too fast, usually running dry.

Usual causes: low coolant or air lock after a coolant change; coolant leak; failing electric water pump

Toyota

Engine coolant pump over-revolution: the electric water pump on the hybrid petrol engine is spinning too fast, usually because it is running dry. Overheating risk.

Usual causes: low engine coolant or air lock after a coolant change; coolant leak; failing electric water pump

What the repair usually costs

Water pump replacement (belt-driven, not behind timing cover)NZ$340–NZ$770 · A$340–A$760
Water pump with timing belt kit (timing-belt-driven pump)NZ$770–NZ$1,970 · A$780–A$1,970
Water pump inside timing cover (chain engine)NZ$980–NZ$2,100 · A$1,020–A$2,160
Radiator replacement (Japanese car / small SUV)NZ$470–NZ$960 · A$450–A$940

Not sure what P148F 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.