Code Definition

P0660 — Intake Manifold Tuning Valve Control Circuit/Open Bank 1

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

About P0660

P0660 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 P0660 is stored, the module has detected an open (broken or disconnected) electrical path 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 P0660 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 P0660 is set when the Engine Control Module (ECM) detects an open circuit or a control issue in the circuit of the Intake Manifold Tuning (IMT) Valve for Bank 1. The IMT valve is responsible for adjusting the airflow within the intake manifold to optimise engine performance at different RPMs. An open circuit in this context means there is a break or disconnection in the electrical pathway that controls the valve. This fault can lead to improper operation of the IMT valve, which might result in reduced engine performance, particularly in terms of power and efficiency at various e...

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