P0017 serious

Crankshaft/Camshaft Position Correlation (Bank 1 Exhaust)

What does P0017 mean?

The P0017 code means the vehicle's onboard diagnostic system has detected: Crankshaft/Camshaft Position Correlation (Bank 1 Exhaust). This is a serious severity code.

Common Symptoms

  • Check Engine Light on
  • Hard starting
  • Rough idle
  • Rattling from timing area
  • Reduced power

Probable Causes (Ranked by Likelihood)

  • Stretched timing chain Very High
  • Worn timing chain tensioner High
  • Faulty camshaft or crankshaft sensor Moderate
  • Damaged cam reluctor wheel Low
  • VVT actuator failure Low

Step-by-Step Diagnostic Procedure

  1. Same approach as P0016 but focused on exhaust cam correlation.

  2. Check for rattle noise on cold start.

  3. Compare exhaust cam timing angle to crankshaft position at idle with a scan tool.

  4. Inspect timing components for wear.

  5. If chain is OK, test exhaust cam position sensor signal quality.

Frequently Asked Questions

Do P0016 and P0017 together always mean timing chain replacement?

Usually yes on high-mileage vehicles. When both the intake and exhaust cam correlations are off, a stretched chain is almost always the cause. Sensor failures can cause one code but rarely both simultaneously.

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