Code Definition

P3016 — Fuel bypass valve circuit open or shorted to ground

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Volkswagen

About P3016

P3016 is a manufacturer-specific powertrain diagnostic trouble code recorded for Volkswagen vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P3016 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; and a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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.

P3016 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The engine control module (ECM) sets this code when it detects an electrical fault in the fuel bypass valve circuit. The fuel bypass valve is used to regulate fuel pressure or flow within the fuel system, depending on the vehicle design. An open circuit or a short to ground prevents proper operation, which can lead to fuel delivery issues and engine performance problems.

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