Engine-Codes - Subaru - P0021 SUBARU

P0021 SUBARU - Intake Camshaft Position Timing Over-Advanced Or System Performance Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0021 SUBARU Possible Causes

  • Low or Dirty Engine Oil
  • Faulty Oil Flow Control Solenoid
  • Oil Flow Control Solenoid harness is open or shorted
  • Oil Flow Control Solenoid circuit poor electrical connection
  • Camshaft Phaser/Sprocket

How is the P0021 SUBARU code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

There is a Factory Service Bulletin for the following Subaru models:
2012–2013 Subaru Impreza
2012–2013 Subaru XV Crosstrek
2013 Subaru Legacy
2013 Subaru Outback
2011–2013 Subaru Forester
Subaru Factory Service Bulletin OBDII Code P0021

What is the cost to diagnose the P0021 SUBARU code

Labor: 1.0

The cost to diagnose the P0021 SUBARU code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/Loss of power
  • Engine rough idle

P0021 SUBARU Meaning

The Active Valve Control System (AVCS) varies camshaft timing by changing the camshaft phase angle depending on engine load in order to increase engine performance and efficiency and lower emission levels. The Engine Control Module (ECM) controls the oil flow control solenoids, mounted on the valve cover of each cylinder head, which acts upon the spool valves to adjust oil pressure flow to the desired chamber inside the camshaft-phasers. The Diagnostic Trouble Code (DTC) sets when the difference between the actual advanced timing and desired advanced timing is larger than the specified amount.

More Information

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