P0016 — Crankshaft–Camshaft Position Correlation (Bank 1 Sensor A)
High severityWhat it means
The crankshaft and camshaft position signals do not line up the way the engine control unit expects. The mechanical timing between the two shafts may have shifted — for example a stretched timing chain or a belt that jumped a tooth — or a sensor is reporting incorrectly.
Common symptoms
- Hard starting or no start
- Rattling noise from the timing cover
- Loss of power, rough running
- Check engine light
Likely causes
- Stretched timing chain or belt that jumped a tooth
- Faulty camshaft or crankshaft position sensor
- Damaged tone/reluctor ring
- VVT phaser stuck out of position
- Low or dirty engine oil affecting the VVT system
What to check first
- Check engine oil level and condition
- Inspect sensor wiring and connectors
- Listen for timing chain noise on cold start
- Have the mechanical timing verified before extended driving
Can you keep driving?
Treat seriously. If the timing has jumped, continued driving can bend valves on many engines. If accompanied by rattling or hard starting, stop driving and have the car inspected.
Frequently asked questions
What is the most common cause of P0016?
The most likely cause is: Stretched timing chain or belt that jumped a tooth. Several other faults can set P0016 as well, so confirm the real cause with live data and the checks above before replacing any parts.
Can I just clear P0016 and keep driving?
Clearing P0016 with an OBD2 scanner turns the warning light off, but if the underlying fault has not been repaired the code will usually come back within a few drive cycles. Fix the cause first, then clear the code to confirm the repair worked.
How serious is P0016?
P0016 is a high-severity code. Diagnose and repair it as soon as possible, because continuing to drive can cause further damage or leave you stranded.
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