P0663 Intake Manifold Tuning Valve Control Circuit/Open Bank 2

The intake manifold tuning valve switches the manifold length or plenum connection with engine speed (more torque low, more power high); it is not the runner or swirl flap (IMRC, P2004 ff). P0663 means the control circuit of the bank 2 valve is open. Bank 2 codes require a V-engine manifold with two separately switched valves; many V engines use a single central valve between the plenums, and no manufacturer document available to us uses this code, so the description follows bank 1. At GM the bank 1 equivalent (P0660) flags 200 kΩ or more with the driver off and lights the lamp after two trips; Ford runs bank-specific checks only for its runner control flaps (IMRC, P2005/P2011) and treats the tuning valve without the lamp. The valve stays in its rest position, with a power loss around the switch-over speed.

Likely causes

Symptoms

• Check engine light (depending on the maker)
• Loss of power in part of the rev range
• Actuator does not click when switching

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, gsi.ext.gm.com, newtonnet.co.uk.