P2663
B Rocker Arm Actuator Control Circuit Low Bank 2
Variable valve lift
Generic OBD-II
Medium
What it means
P2663 means the PCM detected low voltage (usually a short to ground) in the control circuit for the "B" rocker arm actuator on bank 2. This oil-pressure-operated valve switches the engine's valve lift, so a fault can cause a flat spot or reduced power at certain engine speeds. It is the bank-2 counterpart to P2653, an electrical circuit fault that will not prevent the engine from starting.
Medium
Can I keep driving? Drivable, but expect reduced power or rough running at certain engine speeds since the valve-lift actuator may not switch.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or flat spot at higher rpm
- Rough running or slight loss of smoothness
- Often no symptom other than the warning light
Common causes
Most likely first
- Short to ground or low voltage in the rocker-arm actuator (oil control valve) circuit on bank 2Likely
- Failed rocker-arm oil control valveCommon
- Corroded or loose connector at the valve or PCMCommon
- Low or dirty oil affecting valve operationLess often
- Faulty PCM driver (least likely)Less often
How to diagnose & fix
Work through it in order
- Confirm the code and check for the matching bank-1 or open-circuit rocker-arm codes.
- Inspect the actuator connector and wiring on bank 2 for a short to ground or corrosion.
- Check engine oil level and condition, since these valves rely on clean oil pressure.
- Measure the oil control valve resistance and command it with a scan tool.
- Replace the oil control valve if it fails electrically; otherwise repair the wiring. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2663?+
Short-term driving is usually fine, but you may notice weaker performance or roughness at certain rpm. Fix it before extended hard driving to keep the valvetrain working correctly.
Can I just clear P2663?+
It will return until the actuator circuit or oil control valve is repaired. Clearing does not restore the valve-lift function.
Related codes
Often seen with P2663
Read & clear P2663 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX