P1663 Oil Control Valve/Variable Valve Timing RH Bank Malfunction

Category: Powertrain - Ignition
Severity: Check Engine Light
Applies to: Camry V6, Highlander, Sienna

This fault is part of the Toyota VVT-i codes guide. It covers the system and the order to check it.

What does P1663 mean on a Toyota?

P1663. Oil Control Valve/Variable Valve Timing RH Bank Malfunction. This Toyota-enhanced code applies to Camry V6, Highlander, Sienna.

Common causes of P1663

Failed RH oil control valve
Sludged RH valve screen
Low oil level
Open RH OCV circuit
Worn RH timing components

How to fix P1663

Check oil level and condition
Inspect the RH valve screen
Test RH OCV resistance
Command RH VVT and watch response
Replace the valve per findings

Sources and review

Last updated 2026-09-06.