Source-backed diagnostic reference

P3401 EV diagnostic code

Engine oil level is too low, Powertrain Control Module (PCM) failure, Variable valve timing solenoid failure, Wiring issue

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

AUDI: Engine oil level is too low, Powertrain Control Module (PCM) failure, Variable valve timing solenoid failure, Wiring issue Source
GENERIC: Cylinder 1 Deactivation/Intake Valve Control Circuit/Open Source
GENERIC: Cylinder 1 Deactivation/Intake Valve Control Circuit Open Source

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