Question about 2004 Nissan Frontier XE

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My 2004 Nissan Frontier died while coming to a stop, it would turn over but not crank, the code reader gave me codes PO340 - Cam shaft Sensor and PO328 knock sensor, would both need to be replaced ? is there one that should be replaced first? would that make the truck suddenly stop cranking with no other signs or warnings?

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Clean the mass air flow sensor in the air filter tunnel

Posted on Nov 21, 2013

  • JP Services
    JP Services Nov 21, 2013

    im mistaken it is the timing belt

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SOURCE: high idle stalls at lights code for crank sensor

Crankshaft and Camshaft Position Sensors Camshaft Position Sensor Engine timing is determined from the relationship between the crankshaft and camshaft. This relationship is maintained by a timing chain or timing belt. The Engine Management System does not control engine timing but it does monitor the relative position and speed of these shafts by monitoring signals generated by sensors. The Engine Management System (EMS) uses signals generated by the camshaft position sensor to synchronize fuel injection to the valve sequence and for the on-board diagnostic procedure for misfire detection. The EMS energizes the injector at or near the time the intake valve opens. For misfire diagnosis, the EMS compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the EMS receives an incorrect number of pulses Diagnostic Trouble Codes (DTC’s) should be stored in the EMS.
If the camshaft position sensor or circuit is faulty most engines will start. Some engine management systems will then default to a pre-programmed injector firing sequence. All injectors may be energized simultaneously or all of the injectors on one bank may be energized at the same time. If the CMP data is required for misfire detection and reliable CMP data is not present misfire detection would probably be suspended.
Related Symptoms The following symptoms can be caused by an intermittent wiring connection or faulty signal to the EMS:

  • Extended crank time with a cold engine
  • Intermittent rough running
  • Unstable idle
  • Bucking
  • Hesitation
  • Stumble
  • Chuggle
  • Poor fuel economy
  • Stalling on acceleration
Crankshaft Position Sensor Engine speed is a very important input to the Engine Management System (EMS). Crankshaft speed and position are the basis for many calculations made by the computer. Crankshaft position values are transmitted to the computer by pickup coils also known as Permanent Magnet (P/M) generators, hall-effect sensors or optical sensors. The Crankshaft Position Sensor (CKP) also known as engine speed sensor is located in close proximity to the crankshaft.
In addition the EMS uses minute variations in the CKP sensor data to determine engine misfire. The EMS uses this information in conjunction with the camshaft position sensor to perform misfire diagnostics.
Related Symptoms: No Start/Intermittent Start Condition – Can be caused by a faulty crankshaft position sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit

Posted on Jun 23, 2009

  • 14585 Answers

SOURCE: 2000 nissan frontier knock sensor code & distributor

no but the knock sensor does send a signal the ecm and it will ****** or advance the distributor timing

Posted on Jun 14, 2010

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My Nissan micro 2004 model just stopped in the middle of the road one day then the engine management light came on, anyway took it to my local garage TWK Thomas who said it was a cam shaft sensor problem. OK so sensor was put on, engine management light went off for two days only. So went back to the garage they said that another sensor should be fitted on the opposite side. And then the problem should be rectified, but i had given the £160 for this problem to be fixed the first time. I decided it was time to take it to another garage Nis Tec they put it on the computer and a code po340 came up would this mean another sensor or the cam chain has stretched please help. ...claire

Jul 09, 2009 | 1998 Nissan Maxima

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Po340 and po344 intrepid


Take a look at this link http://www.obd-codes.com/p0340.  The problem lies in the cam shaft sensor circuit which means that it isn't necessarily the sensor itself.  Read what that page has to say and just start from the top and work your way down the solutions.  As far as how much it cost, it obviously depends on what is wrong, but assuming it is your cam shaft sensor you can buy the part for around forty dollars at AutoZone.  Let me know if you have any other questions.  Thanks for rating my response and for using FixYa!

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