Crankshaft Position — Camshaft Position Correlation (Bank 1 Sensor A)
Common Symptoms
- Check Engine Light illuminated
- Rough idle or engine stumbling
- Hard starting or extended cranking
- Poor fuel economy
- Reduced engine power or hesitation
- Engine rattling noise on startup
Most Likely Root Causes
- Timing chain or belt stretched or jumped
- Failed or failing camshaft position sensor
- Failed or failing crankshaft position sensor
- Low engine oil level or incorrect oil viscosity causing timing issues
- Variable valve timing solenoid malfunction
Full step-by-step tests, DVOM guidance, and pinout data are available inside the AI Diesel Tech diagnostic session.
AI walks you through every test — one step at a time. Plans start at $12.95/mo.
Component Location
Crankshaft position sensor is typically mounted near the crankshaft pulley or flywheel; camshaft sensor is mounted on the cylinder head near the camshaft.
Manufacturer Notes
Many manufacturers recommend verifying proper engine oil viscosity and VVT solenoid operation before condemning timing components on this code.
Also diagnosing J1939 SPN/FMI codes?
Heavy-duty trucks often throw both OBD-II and J1939 faults simultaneously. AI Diesel Tech handles both protocols in a single guided session.
AI Diesel Tech — The Technician's Diagnostic Engine
AI Diesel Tech diagnostic logic is built by an ASE Certified Diesel Technician. Professional-grade OBD-II and J1939 fault analysis — trusted by technicians nationwide, used in shops, fleets, and training programs.
Get AI-Guided Diagnosis for P0016
The diagnostic engine walks you through every physical test — step by step, on your phone, at the truck.