2002 KIA Sedona: Car will not Start with OBD code P0340?

Yes OBD code P0340 can cause the no start condition for car.

Error code P0340 means problem with Camshaft position sensor A circuit bank 1.


While a bad cam sensor can be the cause of a no-start condition,
And the other possibility can be jumped timing belt which would also set the code for P0340.

The cam sensor is behind the upper timing cover:

See the diagram showing its location :----

You remove the upper timing belt cover to replace the cmp sensor. Takes about 30 minutes.

I would suggest removing the timing covers and verifying that the timing is correct and if it is, then replace the sensor. If not, then it needs timing belt job

See the timing marks diagram shown below:

To verify what is the correct timing,follow the procedure below:----
you have to remove the #1 spark plug, have someone turn the engine over by using a socket on the crankshaft pulley and turning clockwise while you have your finger over the #1 spark plug hole. When you feel air pushing your finger off the hole. It is at TDC(top dead center). Now look at the timing marks on the camshaft sprockets and on the crankshaft sprocket. They should line up as shown in the diagram I already provided.

The #1 spark plug is the one towards the firewall that is closest to the engine pulleys.

Cam sensor is only $45-55, depending upon store you go to. I would go ahead and replace it to start with, and if still no-start, then you thru the process to check the timing belt.

To replace camshaft position sensor its easy,you can do it.
you can do this yourself.
You will remove the 10mm bolts that hold the upper timing cover(there are 2 upper timing covers- remove the one closest to the front of the vehicle. when facing the belts it will be to your right). Once removed, remove the retaining bolts for the cam sensor, unplug it and remove. Install in reverse.

This details will help.
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How to replace Camshaft & Valve Lifters For 5.4L Engine On Ford Mustang?

The details to replace Camshaft & Valve Lifters For 2010 Ford Mustang 5.4L engine and other Mustang years is as follows:----

Removal & Installation

5.4L Engines
Left Side

Specific to:

Ford Mustang 2009-2010

1. Remove the timing drive components.
2. Install the Camshaft Holding Tool.
3. Remove the bolt, washer and camshaft drive sprocket.
4. Remove the bolt, washer and camshaft sprocket spacer.
5. Compress the secondary timing chain tensioner and install a lockpin. 
   
   
   
   Fig. Installing a lockpin in the secondary timing chain tensioner
6. Remove the timing chain and the 2 camshaft sprockets.
7. Remove the 2 bolts and the secondary timing chain tensioner.
   
   NOTE

   The camshaft bearing cap bolts vary in length and head design and must be installed in their original positions. Camshaft bearing caps are not interchangeable and must be installed in their original positions. If not reassembled in their original positions, severe engine damage may occur.
8. Remove the camshaft bearing cap bolts in the sequence shown.
   1. Remove the camshaft bearing caps.
   2. Remove the camshafts.
      
      
      

      

      Fig. Identifying the camshaft bearing cap bolts removal sequence
      
      
      
      

      

      Fig. Exploded view of the LH camshaft (1 of 2)
      
      
      
      

      

      Fig. Exploded view of the LH camshaft (2 of 2)

To install:

NOTE

Lubricate the camshafts with clean engine oil prior to installation.

1. Install the camshafts.
   
   NOTE

   The camshaft bearing cap bolts vary in length and head design and must be installed in their original positions. Camshaft bearing caps are not interchangeable and must be installed in their original positions. If not reassembled in their original positions, severe engine damage may occur.
   
   
   
   NOTE

   Lubricate the camshaft bearing cap bearing surfaces with clean engine oil prior to installation.
2. Install the camshaft bearing caps. Install the bearing cap bolts and tighten in the sequence shown to 89 inch lbs. (10 Nm).
   
   
   

   

   Fig. Identifying the bearing cap bolt installation sequence
3. Install the secondary timing chain tensioner and the bolts. Tighten to 89 inch lbs. (10 Nm).
4. Index the keyways on the camshafts to the 6 o'clock position.
   
   NOTE

   Timing marks must be at the 12 o'clock position or damage to the engine may occur.
   
   
   
   
   

   

   Fig. Indexing the keyways to the 6 o-clock position
5. Install the camshaft sprockets and the chain as an assembly.
6. Install the Camshaft Holding Tool.
7. Install the camshaft sprocket spacer, washer and bolt, and hand-tighten the bolt.
8. Install the camshaft drive sprocket, washer and bolt, and hand-tighten the bolt.
9. Tighten the bolts in 2 stages:
   1. Stage 1: Tighten to 30 ft. lbs. (40 Nm).
   2. Stage 2: Tighten an additional 90 degrees.
      
      
      

      

      Fig. Locating the camshaft drive sprocket bolt
10. Install the timing drive components.

Right Side

Specific to:

Ford Mustang 2009-2010

1. Remove the timing drive components.
2. Install the Camshaft Holding Tool.
3. Remove the bolt, washer and camshaft drive sprocket.
4. Remove the bolt, washer and camshaft sprocket spacer.
5. Compress the secondary timing chain tensioner and install a lockpin.
   
   
   

   

   Fig. Installing the lockpin
6. Remove the secondary timing chain and the 2 camshaft sprockets.
7. Remove the 2 bolts and the secondary timing chain tensioner.
   
   NOTE

   The camshaft bearing cap bolts vary in length and head design and must be installed in their original positions. Camshaft bearing caps are not interchangeable and must be installed in their original positions. If not reassembled in their original positions, severe engine damage may occur.
8. Remove the camshaft bearing cap bolts in the sequence shown.
   1. Remove the camshaft bearing caps.
   2. Remove the camshafts.
      
      
      

      

      Fig. Removing the bearing caps in sequence
      
      
      
      

      

      Fig. Exploded view of the RH camshaft (1 of 2)
      
      
      
      

      

      Fig. Exploded view of the RH camshaft (2 of 2)

To install:

NOTE

Lubricate the camshafts with clean engine oil prior to installation.

1. Install the camshafts.
   
   NOTE

   The camshaft bearing cap bolts vary in length and head design and must be installed in their original positions. Camshaft bearing caps are not interchangeable and must be installed in their original positions. If not assembled in their original positions, severe engine damage may occur.
   
   
   
   NOTE

   Lubricate the camshaft bearing cap bearing surfaces with clean engine oil prior to installation.
2. Install the camshaft bearing caps. Install the bearing cap bolts and tighten in the sequence shown to 89 inch lbs. (10 Nm).
   
   NOTE

   Timing marks must be at the 12 o'clock position or damage to the engine may occur.
   
   
   
   
   

   

   Fig. Identifying the camshaft bearing cap bolt tightening sequence
3. Install the camshaft sprockets and the secondary timing chain as an assembly. Remove the lockpin from the secondary timing chain tensioner.
4. Install the Camshaft Holding Tool.
5. Install the camshaft drive sprocket spacer, washer and bolt, and hand-tighten the bolt.
6. Install the camshaft sprocket, washer and bolt, and hand-tighten the bolt.
7. Tighten the bolts in 2 stages:
   1. Stage 1: Tighten to 30 ft. lbs. (40 Nm).
   2. Stage 2: Tighten an additional 90°.
      
      
      

      

      Fig. Installing the camshaft sprocket bolt
8. Install the timing drive components.

Roller Follower

Specific to:

Ford Mustang 2009-2010

NOTE

During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan, can cause engine failure.

1. Remove the RH or LH valve cover.
   
   NOTE

   If the engine is difficult to rotate while positioning the piston to the bottom of the cylinder, remove the spark plugs.
2. Position the camshaft lobe at base circle.
   
   NOTE

   If the roller followers are to be reinstalled, they must be installed in their original positions. Mark the roller followers for installation into their original locations. Failure to follow these instructions may result in engine damage.
3. Using the Valve Spring Compressor, compress the valve spring and remove the roller follower.
   
   
   

   

   Fig. Removing the roller follower
4. Repeat the previous 2 steps to remove each of the roller followers. Inspect the roller followers.

To install:

1. To install, reverse the removal procedure. Lubricate each of the roller followers with clean engine oil prior to installation.

These details will help.

Thanks.

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