DTC P0021 Intake Camshaft Position - Timing Over-Advanced Or System Performance (Bank 2)
WARNING: This page is about a different car, the 2006 Subaru Outback. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For the diagnostic procedure, refer to
DTC P0011 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.