Cylinder 5 Deactivation Solenoid Control Circuit Open
The P2664 code means the vehicle's onboard diagnostic system has detected: Cylinder 5 Deactivation Solenoid Control Circuit Open. This is a moderate severity code.
- 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
- Cylinder deactivation disabled
- Fuel economy reduced by 1-3 MPG
- Slight vibration during highway cruising
- Engine noise change noticeable
Probable Causes (Ranked by Likelihood)
- Damaged wiring to cylinder 5 solenoid Very High
- Failed deactivation solenoid High
- Low oil pressure to AFM/DFM lifters Moderate
- ECM output driver issue Low
Step-by-Step Diagnostic Procedure
-
Read freeze frame data and confirm P2664 is present
-
Measure solenoid resistance at the connector
-
Check oil pressure with mechanical gauge
-
Verify all AFM solenoids operate when commanded
Frequently Asked Questions
What does P2664 mean?
P2664 indicates a problem with the cylinder 5 deactivation solenoid control circuit open. This affects the vehicle's ability to deactivate cylinders for improved fuel economy.
Can I drive with a P2664 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 P2664?
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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