What P0016 Means
The engine control module has detected that the crankshaft and camshaft are out of their expected timing relationship — meaning the engine's valve timing doesn't match where the crankshaft actually is.
Common Causes
- Worn or stretched timing chain
- Faulty camshaft or crankshaft position sensor
- Timing chain tensioner failure
- Incorrect installation after recent timing work
Symptoms You Might Notice
- Rough running or difficulty starting
- Rattling noise from the timing chain area, especially at startup
- Loss of power
- Check engine light, often flashing
What to Check First
- 1
This is a serious mechanical concern — avoid extended driving until checked
- 2
A mechanic will typically check timing chain stretch and sensor readings with a scan tool that can show live timing correlation
- 3
If the timing chain has stretched, it usually needs replacement along with the tensioner and guides
Frequently Asked Questions
Can I keep driving with this code?
It's not recommended. A timing correlation fault can mean a stretched timing chain, and if it skips further, it can cause serious engine damage (bent valves on many engines). Get it checked as soon as possible.