Safe to drive?
Get it checked now
Limit driving until it's diagnosed
Scanner you need
Any OBD2 scanner
Even a basic code reader shows it
NHTSA complaints quoting it
140
Vehicle complaints, 2015–2025

Common causes

  • Stretched timing chain or jumped belt
  • Faulty exhaust cam phaser or VVT solenoid
  • Low or dirty oil
  • Faulty cam or crank sensor

Symptoms

  • Rough running
  • Rattling at startup
  • Hard starting
  • Stalling
  • Loss of power

Can I drive with it?

Have it checked before driving much. If the timing has slipped, continued driving can cause serious engine damage.

Tip: If P0016 and P0017 appear together, the timing chain (which drives both cams) is the prime suspect.

Which scanner reads it?

Any OBD2 scanner reads it. Live cam/crank correlation data on better tools helps confirm the cause.

Budget tools like the ANCEL AD310 read it; tools with live data and graphing – like the BlueDriver or OBDLink MX+ – help you find the cause. Not sure which fits you? Try the Find My Scanner quiz.

In the data

Of the vehicle complaints owners filed with NHTSA from 2015 to 2025, 140 quote P0017 – most often from Chevrolet, GMC, Buick owners. Complaints lean toward serious problems, so treat this as a sign of how often the code turns up in real reports, not how often cars get it.

Both sources are compared on the Trends page.

General information to help you understand a code – not a diagnosis. Your car’s service information or a qualified mechanic has the final word. See how we research.