P0016 on a BMW: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can often drive a BMW short distances with P0016, but if it idles rough, stalls, or won't start, stop driving — a jumped timing chain can cause major engine damage.

What P0016 means on a BMW

On a BMW, P0016 means the crankshaft and camshaft position sensors on bank 1 are reporting positions that don't line up. BMW's VANOS variable valve timing depends on the two shafts staying in sync, so this code usually points to a stretched timing chain or a VANOS problem. A jumped chain can bend valves and ruin the engine, so it deserves a quick diagnosis.

Is P0016 common on BMWs?

P0016 shows up on chain-driven BMWs like the 3 Series, 5 Series, and X3, especially at higher mileage. Timing chain guides and VANOS solenoids are common wear points, and skipped oil changes speed up chain stretch and sludge buildup.

Commonly reported on: 3 Series, 5 Series, X3, X5.

Symptoms

Check engine light on
Rough idle or stalling
Hard starting in some cases
Loss of power or poor fuel economy

Common causes

most common: Stretched or jumped timing chain
common: Worn timing chain guide or tensioner
common: Faulty VANOS solenoid or camshaft adjuster
less common: Faulty camshaft position sensor
less common: Low oil pressure affecting the VANOS system

How to fix it

Fix	DIY?	Typical cost
Have the camshaft and crankshaft correlation checked with a scan tool	Mechanic	$100–250
Replace the timing chain kit if it is stretched	Mechanic	$1500–3500
Replace a faulty VANOS solenoid	Yes	$150–400
Replace a faulty camshaft position sensor	Yes	$100–250

Frequently asked questions

Can I keep driving my BMW with a P0016 code?

Short distances are usually fine if the engine runs smoothly. If it idles rough, stalls, or won't start, stop driving — a jumped timing chain on a BMW can bend valves and destroy the engine.

What causes P0016 on a BMW?

A stretched timing chain is the most common cause on chain-driven BMW engines. Worn chain guides, a faulty VANOS solenoid, or a bad camshaft position sensor can also set this code.

How much does it cost to fix P0016 on a BMW?

A timing chain job usually runs $1,500–$3,500. A VANOS solenoid is cheaper, around $150–$400, and a camshaft sensor costs about $100–$250.