Code Definition

P0665 — Variable intake air solenoid circuit voltage high - Bank 2

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

About P0665

P0665 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 P0665 is stored, the module has detected a signal or supply voltage higher than the expected operating range; 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 P0665 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 fault code P0665 is set when the Engine Control Module (ECM) detects a higher than normal voltage in the circuit controlling the Variable Intake Air System Solenoid for Bank 2. This solenoid plays a crucial role in the system that adjusts the airflow in the intake manifold, optimising engine performance at different RPMs. A high voltage condition in the solenoid's control circuit could be due to a potential short to power or an internal issue within the ECM. Such high voltage can negatively impact the operation of the variable intake system, possibly leading to performance issues like redu...

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