981 · Engine

P0016

Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

HIGH SEVERITY

The crankshaft and camshaft position signals are out of correlation on Bank 1 — possible cam-timing fault.

SYMPTOMS

  • Check-engine light
  • Hard start or no-start
  • Rough running
  • Power loss

LIKELY CAUSES

  • Cam timing off (chain stretch/tensioner)
  • Faulty cam or crank sensor
  • VarioCam adjuster stuck
  • Reluctor damage

DIAGNOSIS STEPS

  • Compare cam vs crank correlation in live data
  • Inspect cam/crank sensors and reluctors
  • Verify cam timing mechanically if needed

RELATED PARTS

  • Camshaft position sensor
  • Crankshaft position sensor
  • Timing chain/tensioner
← All 981 codes981 hubFault finding
FLAT

Rank symptoms to causes in your garage.

Sign in for the full fault finder — ranked causes and known issues for your exact car.

Start your garage