Valve Timing and Actuation

Variable valve timing and lift — phasers, oil control solenoids, timing chains and their tensioners. This system runs on oil pressure, so it fails the way an oil-pressure system fails: gradually, and often because of an overdue service rather than a broken part.

293 codes · 6 components

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Components

Trouble codes

High 60

Moderate 113

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

Working on this system

Be the first to write this up

Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.

What makes one worth reading:

The car — make, model, year and engine. The same fault behaves differently on each.
What you measured, not only what you replaced.
What actually fixed it — or that nothing did, which is worth knowing too.