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P0021 Diagnostic Trouble Code Discussion for September 2019

Camshaft Position 'A' Timing Over-Advanced / System Performance (Bank 2)

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Trouble Ticket Help Requests for DTC P0021
Help Request Posted
2006 Subaru B9 Tribeca Limited 3.0L MIL Lamp on VIN: 4S4WX85C86
P0021: Camshaft Position - Timing Over-Advanced / System Performance (Bank 2). ... will be greatly appreciated! Thank you in advance! We took this Tribeca in on trade and found it had a warped driver’s side cylinder head. Pulled the engine and removed both heads. The right head was perfectly flat and valves all sealed. Left head w...
September 24, 2019