Code Definition

P3104 — Intake manifold air control solenoid shorted to positive

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

About P3104

P3104 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 P3104 is stored, the module has detected 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.

P3104 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 that the intake manifold air control solenoid circuit is shorted to battery voltage. This solenoid is used to regulate airflow dynamics within the intake manifold, often by controlling variable intake runners. A short to positive can cause continuous or improper operation, affecting engine performance and efficiency.

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