Subaru Fault Code

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P0011

Engine Knock / Sluggish Spool

System

Engine / AVCS

Symptom

Engine Knock / Sluggish Spool

Diagnosis & fix steps

LOGIC: Camshaft Position Timing - Over-Advanced (Bank 1). ACTION: Remove the AVCS Oil Control Valve (OCV) on the front of Bank 1. Test solenoid operation with 12V and clean the spool bore. Check camshaft reluctor teeth for damage and inspect oil feeds for sheared banjo screens.

Red Seal field insights

Cam Phaser Lag: Low oil flow or debris prevents hydraulic oil from exhausting out of the phaser advance chamber, holding the camshaft in an advanced state during idle or deceleration.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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