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P0340

Camshaft position sensor circuit malfunction

The ECU has detected a fault in the camshaft position sensor circuit or signal.

What this code means

The ECU has detected a fault in the camshaft position sensor circuit or signal.

Possible causes

  • Failed camshaft sensor
  • Open or short circuit wiring
  • Connector fault
  • Timing or reluctor issue

Common symptoms

  • Check engine light
  • Hard starting
  • Stalling
  • Poor performance

Checks to make

  1. Inspect camshaft sensor wiring
  2. Check related crankshaft/correlation codes
  3. Review camshaft signal data
  4. Verify mechanical timing if sensor circuit is sound

Safety

  • Do not replace parts from the code alone. Confirm the fault with live data, wiring checks and manufacturer procedures. Keep clear of hot or moving engine components.

Model notes

The code definition is generic; exact diagnostic thresholds, component locations and repair procedures vary by vehicle.