Powertrain, generic · Computer and auxiliary outputs

P0664 Intake Manifold Tuning Valve Control Circuit Low 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). P0664 means the bank 2 control circuit voltage is too low with the driver off – typically a short to ground; with GM-style logic an open circuit is included. 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 (P0661) flags 0.5 Ω or less to ground in 40 of 50 samples, with the lamp after two trips.

Likely causes

Bank 2 control wire shorted to ground
Bank 2 actuator shorted internally to ground
Open circuit (included with GM-style logic)
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

P0661P0663P0665P065F

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