Cylinder Deactivation System Bank 2 Malfunction
2016-2016 Cadillac SRX 2.8L Turbo V6
The 2016 Cadillac SRX is equipped with a 2.8L V6 turbocharged gasoline engine. Below you'll find detailed p3621 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The cylinder deactivation system for Bank 2 has detected a fault.
Symptoms
- Check Engine Light
- Vibration during cruising
- Cylinder deactivation disabled
- Poor fuel economy
- Engine roughness
- MIL and vibration together
Common Causes
- Bank 2 deactivation solenoid failure
- VLOM issue Bank 2
- Low oil pressure
- Collapsed lifter Bank 2
- Oil passage restricted
Diagnostic Steps
- Read Bank 2 deactivation PIDs
- Command Bank 2 deactivation
- Check oil pressure at Bank 2
- Test Bank 2 solenoid resistance
- Monitor Bank 2 cylinder balance
Repair Notes
Replace Bank 2 deactivation solenoid or VLOM. Use AFM-compatible oil.
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
P3621 on Other Vehicles
Common Questions
What does code P3621 mean on a 2016-2016 Cadillac SRX?
P3621 stands for "Cylinder Deactivation System Bank 2 Malfunction". The cylinder deactivation system for Bank 2 has detected a fault.
What are the symptoms of P3621 on a Cadillac SRX?
Common symptoms of P3621 include: Check Engine Light, Vibration during cruising, Cylinder deactivation disabled, Poor fuel economy, Engine roughness, MIL and vibration together.
What causes P3621 on a 2016-2016 Cadillac SRX?
Common causes of P3621 include: Bank 2 deactivation solenoid failure, VLOM issue Bank 2, Low oil pressure, Collapsed lifter Bank 2, Oil passage restricted.
Last updated: March 2026