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P16CF - Intake Rocker Arm Solenoid Valve 2 Control Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Intake Rocker Arm Solenoid Valve 2
  • Intake Rocker Arm Solenoid Valve 2 harness is open or shorted
  • Intake Rocker Arm Solenoid Valve 2 circuit poor electrical connection
  • Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • P16cf Description

    The rocker arm actuator system enables the Engine Control Module (ECM) to change the camshaft lift and duration while the engine is operating. The camshaft has 3 lobes for each intake valve. The inner lobe is for low lift and the 2 outer lobes are for high lift. The rocker arm solenoid valve controls the 2-step lift by controlling the oil flow to the rocker arm. In default mode, a locking pin locks the inner and outer mechanisms of the rocker arm together to provide high lift. When low lift is commanded, oil pressure retracts a locking pin within the rocker arm.

    The rocker arm solenoid valve receives a signal from the ECM. The ECM controls the rocker arm solenoid valve by supplying a 12 V PWM signal. The ECM supplies a ground to the low reference circuit.

    OBDII Code P16cf - Intake Rocker Arm Solenoid Valve 2 Control Circuit - AutoCodes.com

    P16CF Information for specific makes

  • P16CF BUICK Intake Rocker Arm Solenoid Valve 2 Control Circuit
  • P16CF CADILLAC Intake Rocker Arm Solenoid Valve 2 Control Circuit
  • P16CF CHEVROLET Intake Rocker Arm Solenoid Valve 2 Control Circuit
  • P16CF GMC Intake Rocker Arm Solenoid Valve 2 Control Circuit
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    P16CF Comments

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    Repair Importance Level: 3
     
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    Repair Difficulty Level: 3
     
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