Cylinder Deactivation Transition Vibration Excessive
2002-2007 Buick Rendezvous 3.5L V6
Description
The vibration during the transition between full-cylinder and reduced-cylinder operation exceeds the acceptable threshold.
Symptoms
- Noticeable shudder during deactivation transition
- Vibration at highway cruise
- Engine sounds rough during cylinder change
- Passengers feel vibration change
- Steering wheel vibration at cruise
Common Causes
- Engine mount worn or collapsed
- Active engine mount failure
- Deactivation transition timing incorrect
- Pendulum absorber in flywheel damaged
- Cylinder balance issue during transition
Diagnostic Steps
- Monitor vibration levels during cylinder transition
- Inspect engine mounts condition
- Test active engine mount operation
- Check deactivation solenoid timing
- Compare vibration with deactivation enabled vs disabled
Repair Notes
Replace worn engine mounts. Active engine mount systems may need replacement. Recalibrate deactivation transition timing.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P3626 on Other Vehicles
Common Questions
What does code P3626 mean on a 2002-2007 Buick Rendezvous?
P3626 stands for "Cylinder Deactivation Transition Vibration Excessive". The vibration during the transition between full-cylinder and reduced-cylinder operation exceeds the acceptable threshold.
What are the symptoms of P3626 on a Buick Rendezvous?
Common symptoms of P3626 include: Noticeable shudder during deactivation transition, Vibration at highway cruise, Engine sounds rough during cylinder change, Passengers feel vibration change, Steering wheel vibration at cruise.
What causes P3626 on a 2002-2007 Buick Rendezvous?
Common causes of P3626 include: Engine mount worn or collapsed, Active engine mount failure, Deactivation transition timing incorrect, Pendulum absorber in flywheel damaged, Cylinder balance issue during transition.