P3624high severityPowertrain
Cylinder Deactivation System Oil Pressure Low
on 2021 Mazda MX-5 Miata 2.0L I4 · RWD
What this code means
The oil pressure dedicated to the cylinder deactivation system is below the minimum threshold for reliable lifter switching.
Symptoms
- Check Engine Light
- Cylinder deactivation disabled
- Engine noise during attempted deactivation
- Lifter tick on deactivation command
- Oil pressure warning at idle
Common causes
- Low engine oil level
- Oil pump wear reducing pressure
- Wrong oil viscosity installed
- VLOM assembly internal leak
- Clogged oil filter restricting flow
Diagnostic steps
- Check engine oil level and condition
- Measure oil pressure at deactivation gallery
- Verify correct oil viscosity
- Test VLOM assembly seal integrity
- Inspect oil filter for restriction
Repair notes
Top off or change engine oil with correct AFM-compatible specification. Replace oil pump if pressure is low at all speeds. Replace VLOM if internal leak found.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1