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DTC P0340: Camshaft Position (CMP) Sensor Circuit Malfunction (Bank 1)

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P0340 - CAMSHAFT POSITION (CMP) SENSOR CIRCUIT MALFUNCTION (BANK 1)

Description:  The test fails when the powertrain control module (PCM) can no longer detect the signal from the CMP sensor on bank 1.
Possible Causes: 
  • CMP circuit open
  • CMP circuit short to GND
  • CMP circuit short to PWR
  • SIG RTN open (VR sensor)
  • CMP GND open (Hall-effect sensor)
  • CMP circuit short to CMP2 circuit (if equipped)
  • CMP incorrectly installed (Hall-effect sensor)
  • Damaged CMP sensor shielding
  • Damaged CMP sensor
  • Damaged PCM
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 GO to DR: Camshaft Position (CMP) Sensor STEP DR1.
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