Code Definition

P0020 — Camshaft Position A Actuator Circuit (Bank 2)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0020

P0020 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0020 is stored, the module has detected a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0020 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC P0020 identifies an electrical fault in the control circuit for the bank 2 intake ('A') camshaft position actuator, the oil control solenoid that operates the variable valve timing (VVT/VCT) phaser. The Engine Control Module switches this solenoid with a pulse width modulated signal to route engine oil into the phaser and advance or retard the intake camshaft, and it monitors the circuit for correct current and voltage. P0020 sets when the ECM sees an open circuit, a short to power or ground, or an out of range current in that actuator control circuit rather than a mechanical timing error....

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