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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 P0325: Knock Sensor 1 Circuit (Bank 1)

DTC P0325: Knock Sensor 1 Circuit (Bank 1)

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P0325 - KNOCK SENSOR 1 CIRCUIT (BANK 1)

Description:  The knock sensor detects vibrations upon increase and decrease in engine RPM. The knock sensor generates a voltage based on this vibration. If the voltage goes outside a calibrated level, a DTC is set.
Possible Causes: 
  • Knock sensor circuit short to PWR
  • Knock sensor circuit short to GND
  • Knock sensor circuit open
  • Damaged knock sensor
  • Damaged PCM
Diagnostic Aids:  A knock sensor voltage greater than 0.5 volt with the key on and engine off indicates a concern.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All - GO to PINPOINT TEST DG . GO to PINPOINT TEST DG .