2003 Nissan Sentra P340

Tiny
MIGMAN77
  • MEMBER
  • 2003 NISSAN SENTRA
  • 4 CYL
  • FWD
  • MANUAL
  • 92,000 MILES
How to find and repair P340 cam position sensor. 2003 nissan sentra se-r spec-v 2.5L
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Monday, September 6th, 2010 AT 9:23 PM

4 Replies

Tiny
RASMATAZ
  • MEMBER
Hi migman77, Welcome the 2carpros and TY for the donation

Camshaft Position Sensor (2.5L) At rear of cylinder head.


http://www.2carpros.com/forum/automotive_pictures/12900_cmh_5.jpg



P0340 - Camshaft Position Sensor Circuit MalfunctionP0340 Description
The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Powertrain Control Module (PCM) or Electronic Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.

When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.

When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine StallWhen is the code detected?- The camshaft position sensor signal is not detected by the ECM during the first few seconds of engine cranking
- The proper pulse signal from the camshaft position sensor is not Possible Causes- Harness or connectors (The sensor circuit is open or shorted)
- Camshaft position sensor may be faulty
- Camshaft (Intake) may be damage
- Starter motor may be faulty
- Starting system circuit
- Dead (Weak) batteryPossible Solution- Charge battery
- Repair harness or connector
- Replaced Camshaft Position Sensor.
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Monday, September 6th, 2010 AT 10:22 PM
Tiny
MIGMAN77
  • MEMBER
Is it possible to show me in the picture or tell me where the end part of the connector is at? I see it runs across the engine. Does it go under or should I just be looking on the opposite side for another clip?

Thank you in advance for your help. This will definitely help me out with replacing the cam position sensor, now I know where to start and what to look for. Hopefully this is the fix and only problem.
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Tuesday, September 7th, 2010 AT 7:19 AM
Tiny
RASMATAZ
  • MEMBER
Dunno how its routed thru but it goes back to the computer and has these color wires on it behind the engine block-see below


http://www.2carpros.com/forum/automotive_pictures/12900_cam_16.jpg

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Tuesday, September 7th, 2010 AT 3:59 PM
Tiny
MIGMAN77
  • MEMBER
Thanks again.
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Tuesday, September 7th, 2010 AT 5:18 PM

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