Cause
Faulty valve lift control solenoid
The solenoid switching oil to the mechanism that changes valve lift. It is moved by engine oil through fine screens, so oil condition is a diagnostic question here rather than a maintenance one — the free first check is the dipstick and the service record, not the part.
Typically a moderate job.
Some of these codes mean you should stop driving
4 of the 20 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (20)
Codes where this is a likely explanation first, rather than merely a possible one.
- P2645 A Rocker Arm Actuator Control Circuit Open Bank 1 Likely for this code Moderate
- P2647 A Rocker Arm Actuator System Stuck On Bank 1 Likely for this code Stop driving High
- P2648 A Rocker Arm Actuator Control Circuit Low Bank 1 Likely for this code Moderate
- P2650 B Rocker Arm Actuator Control Circuit Open Bank 1 Likely for this code Moderate
- P2652 B Rocker Arm Actuator System Stuck On Bank 1 Likely for this code Stop driving High
- P2653 B Rocker Arm Actuator Control Circuit Low Bank 1 Likely for this code Moderate
- P2655 A Rocker Arm Actuator Control Circuit Open Bank 2 Likely for this code Moderate
- P2657 A Rocker Arm Actuator System Stuck On Bank 2 Likely for this code Stop driving High
- P2658 A Rocker Arm Actuator Control Circuit Low Bank 2 Likely for this code Moderate
- P2660 B Rocker Arm Actuator Control Circuit Open Bank 2 Likely for this code Moderate
- P2662 B Rocker Arm Actuator System Stuck On Bank 2 Likely for this code Stop driving High
- P2663 B Rocker Arm Actuator Control Circuit Low Bank 2 Likely for this code Moderate
- P2646 A Rocker Arm Actuator System Performance or Stuck Off Bank 1 Moderate
- P2649 A Rocker Arm Actuator Control Circuit High Bank 1 Moderate
- P2651 B Rocker Arm Actuator System Performance or Stuck Off Bank 1 Moderate
- P2654 B Rocker Arm Actuator Control Circuit High Bank 1 Moderate
- P2656 A Rocker Arm Actuator System Performance or Stuck Off Bank 2 Moderate
- P2659 A Rocker Arm Actuator Control Circuit High Bank 2 Moderate
- P2661 B Rocker Arm Actuator System Performance or Stuck Off Bank 2 Moderate
- P2664 B Rocker Arm Actuator Control Circuit High Bank 2 Moderate
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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