Fault Family System: Powertrain (P-Codes) 9 SAE Codes

Cylinder Intake Valve Lift Performance

Diagnostic & Technical Explanation

Code P2DEA (Cylinder 1 Intake Valve Lift Range/Performance) sets when a cylinder's intake valve does not reach its commanded lift profile (high or low lift, or fully deactivated), reported per cylinder, per bank, or as a system-wide check on engines with switchable valve lift. Aerated or degraded engine oil that cannot build the switching pressure a hydraulic lifter or rocker needs, a stuck lifter/rocker pin, or a failed lift-control solenoid on the affected cylinder or bank are the common causes.

These 9 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 9 times.

Codes in this family (9)

Code	Definition	Repair coverage
P2DEA	Cylinder 1 Intake Valve Lift Range/Performance	4 ranked fixes
P2DEB	Cylinder 2 Intake Valve Lift Range/Performance	4 ranked fixes
P2DEC	Cylinder 3 Intake Valve Lift Range/Performance	4 ranked fixes
P2DED	Cylinder 4 Intake Valve Lift Range/Performance	4 ranked fixes
P2DEE	Cylinder 5 Intake Valve Lift Range/Performance	4 ranked fixes
P2DEF	Cylinder 6 Intake Valve Lift Range/Performance	4 ranked fixes
P2DF0	Intake Valve Lift Range/Performance Bank 1	4 ranked fixes
P2DF1	Intake Valve Lift Range/Performance Bank 2	4 ranked fixes
P2DF2	Intake Valve Lift System Range/Performance	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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