Credov

P0117 fault code: what it means

P0117: Coolant temperature sensor signal is too low (reads very hot). Can make the fans run constantly or upset fuelling.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. shorted coolant temperature sensor
  2. signal wire shorted to earth
  3. corroded connector

P0117 by make

BMW

Coolant temperature sensor reading too low (signal shorted). Can upset the electric water pump and fan control.

Usual causes: coolant temperature sensor failed; sensor wiring shorted

Isuzu

Coolant temperature sensor circuit low.

Usual causes: faulty coolant temp sensor; wiring short

Mini

Coolant temperature sensor reading too low (signal shorted).

Usual causes: coolant temperature sensor failed; sensor wiring shorted

Not sure what P0117 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.