Severity: High
Can damage expensive parts or affect drivability. Limit driving and book promptly.
What P0016 means
Crank and cam sensor signals are out of their normal relationship. On many engines this means a stretched timing chain or a cam phaser problem.
Symptoms
- Rattle at startup
- Rough running
- Long crank
Common causes
Most likely first
- 1Stretched timing chain or worn guides
- 2Sticking cam phaser or VVT solenoid
- 3Low or dirty oil affecting VVT
- 4Timing belt jumped a tooth
How we diagnose it
- Check oil level and condition
- Check cam/crank correlation values in live data
- Scope crank and cam signals
- Inspect timing components per OEM procedure
Every vehicle sets codes under its own conditions. We check the factory diagnostic steps and service bulletins for your VIN, so the repair targets the actual cause.