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P0340 - Camshaft Position Sensor A Circuit (Bank 1 Or Single Sensor)

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P0340 - CAMSHAFT POSITION SENSOR A CIRCUIT (BANK 1 OR SINGLE SENSOR)

Description:  The test fails when the powertrain control module (PCM) can no longer detect the signal from the camshaft position (CMP) sensor.
Possible Causes: 
  • CMP circuit open
  • CMP circuit short to GND
  • CMP circuit short to PWR
  • SIG RTN open (VR sensor)
  • Damaged CMP sensor shielding
  • Damaged CMP sensor
Diagnostic Aids:  Harness routing, harness alterations, improper shielding, or electrical interference from other improperly functioning systems may have an intermittent impact on the CMP signal.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   - refer to PINPOINT TEST DR . refer to PINPOINT TEST DR .
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