Porsche 911 diagnostics

Porsche OBD / OBD-II fault codes

Public library of published fault codes: description, symptoms, probable causes, checks to perform, related parts and direct access to the AI assistant.

70published codes

1result(s).

P0021

Camshaft timing over-advanced, bank 2

High

System : EngineCompatibility : 911 997/991

Probable causes : timing adjustment; Variocam actuator; camshaft sensor; wiring harness

Checks to perform : Read actual values; check connector; verify alignment; test actuator

Related parts : camshaft sensor Variocam actuator tensioner

System: Engine — Camshaft position relative to the crankshaft out of range on bank 2.

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