P1349 – VVT System Malfunction (Oil Control Valve) (Toyota)

Description

The ECM detected improper operation of the VVT oil control valve affecting camshaft timing response.

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Symptoms

Rough idle
Poor acceleration
Engine hesitation
Reduced power
Check engine light

Causes

Stuck OCV valve
Dirty or low oil
Clogged oil passages
Weak oil pressure
ECM VVT control fault

Diagnosis

Check oil level
Inspect OCV movement
Measure oil pressure
Scan VVT data
Check cam timing

Repair

Replace OCV valve
Change oil
Clean oil passages
Repair cam timing