P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
Severity: high
What it means: The crankshaft and bank 1 camshaft (sensor A) signals don't line up the way they should, which suggests a timing relationship problem.
Safe to drive? Have it checked soon. A jumped or stretched timing chain or belt can lead to engine damage.
Common symptoms
- Check-engine light
- Hard start or no-start
- Rattle at startup
- Rough running
Likely causes, ranked
- Stretched timing chain or worn guides/tensionerShop
- Faulty cam or crank position sensorDIY
- Sticking VVT solenoid or phaserShop
- Low oil level or pressureShop
Vehicle-specific notes
- 2010–2011 Chevrolet Equinox: 2.4L timing chain wear or stretch, often made worse by low oil from oil consumption. Read the full answer · Source
What it means: The crankshaft and bank 1 camshaft (sensor A) signals don't line up the way they should, which suggests a timing relationship problem.
Severity: High. Safe to drive? Have it checked soon. A jumped or stretched timing chain or belt can lead to engine damage.
DIY or shop?
Sensor checks are DIY. Timing chain work is a shop job.
Before you replace parts
- Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
- Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
- Clear the code only after a repair, then confirm it stays off after a few drives.
- Check your VIN for recalls and service bulletins.
Safety / mechanic note
Verify with a mechanic. This code can involve stalling, engine damage or loss of power. If the check-engine light is flashing, or the car stalls or runs badly, stop driving and have it inspected.