Possible causes

– Thermostat
– Cooling fan harness is open or shorted
– Cooling fan circuit poor electrical connection
– Faulty cooling fan motor
– Engine Control Module (ECM) Program
– Faulty IPDM E/R
– Faulty Cooling fan control module
– Radiator hose
– Radiator
– Radiator cap
– Water pump

Tech notes

The most likely cause that will trigger the P1217 code is the thermostat.

When is the code detected?

– Cooling fan does not operate properly (Overheat)
– Cooling fan system does not operate properly (Overheat)
– Engine coolant was not added to the system using the proper filling method
– Engine coolant is not within the specified range.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Engine overheating

P1217 INFINITI Description

If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will rise. When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is indicated.