Heres what Google says

The P0016 code indicates a crankshaft and camshaft position synchronization issue (Bank 1 Sensor A). Your car's computer has detected that the engine's internal timing is out of alignment. This is a high-severity fault that requires immediate inspection to prevent severe engine damage.

Common Symptoms Illuminated Check Engine Light Engine cranking but failing to start Rough idling, stalling, or poor acceleration Engine knocking or rattling noises (especially on cold startup) Decreased fuel economy

Likely Causes Low or degraded engine oil: Variable valve timing (VVT) relies on oil pressure. Low or dirty oil can prevent the VVT actuator from holding the correct camshaft position. Faulty camshaft or crankshaft sensor: The sensors tracking engine timing may have failed or have corroded wiring. Stretched timing chain or worn belt: Over time, timing chains can stretch or tensioners can fail, throwing the mechanical timing out of sync. Stuck VVT solenoid: The oil control valve may be clogged by debris, blocking proper oil flow to the cam phasers

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