What Does P0664 Mean?
The PCM has detected a low voltage condition in the intake manifold tuning valve (IMTV) control circuit for bank 2. This indicates a short to ground in the circuit, causing the control signal to be pulled below the expected operating range. The bank 2 intake runner tuning system cannot properly adjust runner length for optimal airflow. The driver may notice reduced torque at mid-range RPMs and slightly degraded fuel economy.
Common Causes
35%
Short to ground in bank 2 IMTV wiring harness
30%
Internally shorted bank 2 IMTV solenoid
20%
Water intrusion or corrosion in connector causing low resistance path
10%
Chafed wiring contacting engine block or bracket
5%
PCM internal driver fault pulling circuit low
Diagnostic Steps
1
Review freeze frame data and compare with bank 1 IMTV operation to determine if this is an isolated bank 2 issue.
2
Disconnect the bank 2 IMTV solenoid and measure coil resistance — typical spec 20-40 ohms. A very low reading (under 5 ohms) confirms a shorted solenoid.
3
With the solenoid disconnected, check for continuity between the control wire and chassis ground. If continuity is found, trace the wire for a short to ground — pay particular attention to areas near exhaust manifolds and sharp bracket edges.
4
Inspect the connector for signs of water intrusion, green corrosion, or carbon tracking between pins. Clean with electrical contact cleaner and apply dielectric grease.
5
If the wiring and solenoid test good, clear the code and monitor the circuit voltage at the PCM with the solenoid reconnected. If voltage drops below spec immediately, suspect PCM driver failure.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
The PCM has detected a low voltage condition in the intake manifold tuning valve (IMTV) control circuit for bank 2. This indicates a short to ground in the circuit, causing the control signal to be pulled below the expected operating range. The bank 2 intake runner tuning system cannot properly adju...
The most common cause of P0664 (Intake Manifold Tuning Valve Control Circuit Low (Bank 2)) is: Short to ground in bank 2 IMTV wiring harness
Typical repair costs for P0664 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally safe to drive. The bank 2 intake tuning valve will be inoperative, defaulting to one runner length. Expect slightly reduced mid-range torque and a minor fuel economy decrease. No safety hazard, but address within a few weeks.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0664 to identify the root cause.
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Quick Info
Category
Powertrain
System
Intake / Air Management
Difficulty
Type
Generic (SAE)
Recommended Tools
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