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Most common cause for code P0340 of 95 Ranger

95 Ford Ranger 3.0 - code P0340 keeps re-occurring. What is the most common cause for this code to show, and where is the cam sensor located on this engine?

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Hi, the cam shaft sensor will be located Under the hood, center, upper engine area, mounted behind rear of intake manifold, in the engine block.


This is a magnetic or hall effect sensor. It sends a signal to the computer relaying information about shaft speed, position and acceleration or deceleration. This information determines when the fuel/air mixture needs to be ignited and how much mixture is needed for the engine.

The possible causes of failure will be faulty housing or faulty wires as well. A faulty ECM could trigger a false alarm as well. this is highly unlikely but, possible in most cases. The most reported reasons is flat out sensor failure.

Posted on May 21, 2009

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Below are causes for a P0340 code.
Trouble Code: P0340 (3.8L V6 VIN 4 Auto)
Camshaft Position Sensor Circuit Malfunction Print this code datamost common cause for code P0340 of 95 Ranger - print_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details

Trouble Code Conditions:
Engine started, and the PCM detected the CMP sensor signal was missing or it was erratic.
Possible Causes:
  • CMP circuit open
  • CMP circuit short to GND
  • CMP circuit short to voltage
  • 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)
The CMP sensor, also known as the Cylinder Identification (CID) sensor, provides camshaft position information, called the CMP or CID signal, which is used by the Powertrain Control Module (PCM) for fuel and ignition system synchronization.
The sensor is located at the front of the engine in the bore formerly occupied by the distributor

Posted on May 21, 2009

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