Code : P1289
Make : MAZDA
Description : P1289 MAZDA Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
Possible causes :
– Wrong thermostat
– Not at operating range
– Engine overheated
– Low engine coolant level
– Faulty Cylinder Head Temperature (CHT) sensor
– Cylinder Head Temperature (CHT) sensor harness is open or shorted
– Cylinder Head Temperature (CHT) sensor circuit poor el
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.