P2665 moderate

Cylinder 6 Deactivation Solenoid Control Circuit Open

The P2665 code means the vehicle's onboard diagnostic system has detected: Cylinder 6 Deactivation Solenoid Control Circuit Open. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$300 - $2000 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • V4/eco mode not engaging
  • Higher than expected fuel usage
  • Subtle engine roughness at light load
  • Valve train ticking sound

Probable Causes (Ranked by Likelihood)

  • Open wiring to cylinder 6 deactivation solenoid Very High
  • Solenoid coil internal failure High
  • Sludge buildup restricting solenoid operation Moderate
  • PCM software glitch Low

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2665 is stored

  2. Test solenoid resistance with multimeter

  3. Perform oil system flush if sludge is suspected

  4. Update PCM software to latest calibration

Frequently Asked Questions

What does P2665 mean?

P2665 indicates a problem with the cylinder 6 deactivation solenoid control circuit open. This affects the vehicle's ability to deactivate cylinders for improved fuel economy.

Can I drive with a P2665 code?

You can drive short distances. The cylinder deactivation system will be disabled, reducing fuel economy. Have it checked to prevent potential lifter damage.

How much does it cost to fix P2665?

Repairs typically cost $300 - $2000. Simple solenoid replacement is less expensive, but collapsed lifter repair can be $2,000 or more.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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