Powertrain, generic · Computer and auxiliary outputs

P0665 Intake Manifold Tuning Valve Control Circuit High Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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). P0665 means the bank 2 control line stays high with the driver on – a short to voltage or overcurrent, after which the driver shuts off. 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 (P0662) flags 0.5 Ω or less to positive in 40 of 50 samples, with the lamp after two trips.

Likely causes

Bank 2 control wire shorted to voltage
Actuator winding shorted (overcurrent)
Corrosion or moisture in the connector
Output driver in the engine module faulty

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

DifficultyEasyDIY possible
Parts and labour€20–350
Time0.5–2 h

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

Parts involved

intake manifold tuning valvevalve actuatoractuator wiring

Related codes

P0662P0663P0664P065F

References: law.cornell.edu, gsi.ext.gm.com.