For Shop Owners

P0028 SUBARU - Intake Valve Control Solenoid Circuit Range/Performance Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Dirty engine oil
  • Low engine oil level
  • Faulty intake valve control solenoid
  • Intake valve control solenoid harness is open or shorted
  • Intake valve control solenoid circuit poor electrical connection
What does this mean?

When is the code detected?

ECM monitors OCV stuck while cam signal is normally generating and Valve cleaning is not in progress.If the CAM Acutal Position is too high or low and Difference between Cam Actual Positionand Desired Position is higher than 20° ECM determines that a fault exists and the P0028 codes is set.

Possible symptoms

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

P0028 SUBARU Description

The Continuously Variable Valve Timing (CVVT) system is installed to the chain sprocket of the intake camshaft. This system controls the intake camshaft to provide the optimal valve timing. The Engine Control Module (ECM) controls the Oil Control Valve(OCV), based on the signals output from mass air flow, throttle position and engine coolant temperature. The CVVT controller regulates the intake camshaft angle using oil pressure through the OCV. As result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves, exhaust emissions decrease under overall driving conditions.
OBDII Code P0028 Subaru - Intake Valve Control Solenoid Circuit Range/Performance Bank 2 -

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P0028 SUBARU Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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