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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls - Powertrain DTC Charts & Descriptions - (Hybrid)) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> DTC P1288: Cylinder Head Temperature (CHT) Sensor Out Of Self-Test Range

DTC P1288: Cylinder Head Temperature (CHT) Sensor Out Of Self-Test Range

WARNING: This page is about a different variant/trim than selected.
P1288 - CYLINDER HEAD TEMPERATURE (CHT) SENSOR OUT OF SELF-TEST RANGE

Description:  Indicates the CHT sensor is out of self-test range. The engine is not at a normal operating temperature.
Possible Causes: 
  • Cold engine
  • Engine overheating
  • Damaged harness connector
  • Low engine coolant level
  • Damaged CHT sensor
Diagnostic Aids:  Bring the engine to operating temperature. If cold, repeat the self-test. If the engine overheats, check the cooling system.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST DL .