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P0663Intake Manifold Tuning Valve Control Circuit/Open (Bank 2)

The control circuit for the Bank 2 intake manifold tuning valve is open or not responding electrically.

Definition

On V-configuration engines with per-bank intake tuning, the PCM drives a separate intake manifold tuning (IMT) valve for Bank 2 and monitors that control circuit. P0663 sets when the PCM detects an open circuit or absent feedback on the Bank 2 valve, mirroring P0660 on the opposite bank. The valve defaults to a fixed position, producing a modest loss of torque in part of the RPM range, and the MIL illuminates, which fails emissions inspection; if both bank codes set together, look for a shared power feed or connector fault.

Common causes

  • Failed Bank 2 tuning valve solenoid or actuator (open winding)
  • Disconnected or corroded connector at the Bank 2 valve
  • Open wiring between the PCM and the Bank 2 valve
  • Shared supply fuse or splice fault (suspect this when Bank 1 codes set simultaneously)
  • Carbon-seized valve mechanism that overloaded and burned out the actuator
  • Failed PCM driver circuit (least common)

Common misdiagnoses

  • Both bank valves or the whole manifold replaced when only the Bank 2 circuit is open
  • MAF or MAP sensor replaced for a mild power complaint
  • Throttle body serviced instead of testing the actuator circuit
  • PCM replaced before basic winding and continuity tests

Troubleshooting steps

  1. 1.Identify the Bank 2 valve location

    Confirm which side of the engine is Bank 2 (the bank opposite cylinder 1) and inspect that tuning valve's connector and wiring for obvious damage.

  2. 2.Actuate the valve with a scan tool

    Command the Bank 2 tuning valve with bidirectional control and verify audible or visible movement; compare its response with the working Bank 1 valve.

  3. 3.Measure the actuator winding

    Disconnect the Bank 2 valve and check solenoid resistance against the service specification; an open reading condemns the valve.

  4. 4.Test circuit continuity and supply

    Verify continuity from the PCM to the valve connector and confirm the supply voltage feed is present, checking any fuse or splice shared with Bank 1.

  5. 5.Confirm repair across the RPM range

    Clear codes, run the engine through the RPM band where the valve switches, and verify the code does not reset and both banks command symmetrically.

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