P2664 code meaning
"B" Rocker Arm Actuator Control Circuit High (Bank 2)
Powertrain system Generic code P26xx codes Check engine light
What P2664 means
P2664 signals excessive voltage on the control line of solenoid B, bank 2. Contact with a powered conductor, for example where several solenoid and injector feeds share a connector, or a driver that can no longer pull the line down, are the typical causes. Depending on how the output is wired, the valve may then be energised all the time, keeping stage B on that bank engaged, or not work at all. No manufacturer publishes P2664 or a threshold for it. GM monitors the corresponding A circuits on its 2015 four-cylinders with a Type A driver test above 11 V, which shows the usual approach. CARB lists shorts to power among circuit faults that lift system outputs must detect. Compare P2663 for a low reading, P2660 for an open and P2654 on bank 1.
P2664 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2664
- MIL on
- Misfire or rough idle on bank 2 if the stage stays engaged
Common causes of P2664
- Most likelyShort to a powered feed inside a shared engine connector
- PossibleOutput driver in the control module stuck off
- Less likelyInternally shorted solenoid B on bank 2
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rocker arm actuator b b2Oil control valveWiring harness
What each part of P2664 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 64 | The exact fault in that area. |
What to do next
- Note P2664 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2664
What does P2664 mean?
P2664 means ""B" Rocker Arm Actuator Control Circuit High (Bank 2)". P2664 signals excessive voltage on the control line of solenoid B, bank 2. It is a generic code, so it means the same on every make.
Is it safe to drive with P2664?
Drive gently and only to a workshop. With P2664 the car can go into limp mode (reduced power) to protect itself.
Will P2664 fail an emissions test?
Yes, it can. P2664 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2664 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2664 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.