Code Definition

P0020 (39) — Intake Variable Cam Timing Solenoid Short or Open 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 an open (broken or disconnected) electrical path in the monitored circuit; a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; and 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

The Engine Control Module (ECM) operates an Oil Control Valve (OCV) solenoid on the Bank 2 intake camshaft to direct pressurised engine oil into the variable valve timing phaser, advancing or retarding intake cam angle as commanded. DTC P0020 with subcode 39 indicates the ECM has detected an electrical fault on that OCV control circuit, typically an open circuit, a short to ground, or a short to battery voltage on either the control side or the feed side of the solenoid. The code is triggered when the feedback voltage at the driver inside the ECM does not match the expected level for the comma...

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