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Diagnose/P0340
P0340High SeverityEngine

Camshaft Position Sensor A Circuit Malfunction (Bank 1)

What This Means

The camshaft position sensor circuit has malfunctioned. This sensor tells the engine computer the position of the camshaft, which is essential for sequential fuel injection and variable valve timing.

Common Symptoms

  • Hard starting or no start
  • Rough idle
  • Stalling
  • Check engine light on

Common Causes

  • Failed camshaft position sensor
  • Damaged or stretched timing chain/belt
  • Wiring issue to the sensor
  • Worn sensor reluctor wheel
  • Oil contamination

Estimated Repair Cost

$100 – $400
Parts and labor (varies by vehicle and location)
Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.