P1656 Oil Control Valve Circuit Malfunction

Category: Powertrain - Ignition
Severity: Check Engine Light
Applies to: Camry, Corolla, RAV4 with VVT-i

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

What does P1656 mean on a Toyota?

P1656. Oil Control Valve Circuit Malfunction. This Toyota-enhanced code applies to Camry, Corolla, RAV4 with VVT-i.

Common causes of P1656

Failed oil control valve
Open or shorted OCV circuit
Sludged valve screen
Low oil level
Corroded connector

How to fix P1656

Check oil level and condition
Test OCV resistance
Inspect the valve screen
Verify power and command
Replace the OCV per test data

Sources and review

Last updated 2026-09-06.