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How to diagnose timing belt verses cam sensor wont start and sounds funny when turning over

Engine started idleing rough and making a noise after turning engine off it would not restart and sounds funny when turning over its a 2004 neon rt codes were po16 and po340

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  • Cars & Trucks Master
  • 21,873 Answers

If it sounds like it has no compression I would vote for the timing belt. Code 16 is for the cam and crank sensors being out of sync, and code 340 is no signal from the cam sensor. Which would happen if the cam is not turning.

Posted on Feb 10, 2014

  •  Stephen
    Stephen Feb 10, 2014

    I should also add the 2.0 code F engine is an interference style which means if the engine is running when the belt breaks, damage to the valves can occur.

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6ya6ya
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Posted on Jan 02, 2017

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robshow
  • 367 Answers

SOURCE: 2004 kia optima

Try the ignition switch,

For the Crank sensor there is a small metal disc that mounts behind the sensor if that is cracked or dammaged or installed backwards you will get same results as if it wasn't Make sure the timing marks line up on your timing belt. www.kiatechinfo.com

Posted on Jan 19, 2009

keithheavili
  • 410 Answers

SOURCE: 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!

Posted on May 29, 2009

  • 51 Answers

SOURCE: 2003 Dodge Neon: P0016 (already replaced sensors, belt, tensioner

the computer may need to be reflashed. if it is running then it is not a bad sensor. either of those being bad would cause it not to run.

Posted on Aug 08, 2009

  • 333 Answers

SOURCE: timming belt routing on 2002 montero xlt 3.5

The Marks are different (ie 12oclock/11:30 or so) as pictured here. I will post again if it is too small to read (sometimes fixya shrinks pictures)

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Posted on Nov 08, 2009

krolik7
  • 1 Answer

SOURCE: 2004 Kia Optima no start after timing belt, crank, cam sensor replacement

did you use aftermarket crank sensor? if so that might be your problem. dealer has several different ones, by providing vin number, but there is only one after market for all optimas 01-05. try to connect thick pink wire and thick orange wire together on the ignition failure sensor. you might have the same problem as me. good luck.

Posted on Jan 15, 2010

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