Had engine codes P0011/12 and P0321. Got it checked out, and was told my Camshaft tensioner was needing to be replaced. The Midas I got is checked at is in a more expensive area, so their prices are a bit high. They estimated around 1000$USD. Is that about right? How much would something like this be? Would it be more appropriate to get it done by a dealer? Thanks, Jared

Sounds like all those sensors are going to need replaced. Basically, they are all in charge of metering the air and fuel to the engine, so if they are malfunctioning, the car isn't going to run correctly.

What is your engine?

You never take your vehicle to places like midas , pep boy's , firestone etc.. Find yourself a local independent repair shop . Po300 is a random misfire , not cylinder specific ! Causes ,lean air fuel mixture , vacuum leaks , low fuel pressure , clogged fuel filter , a O2 sensor problem . You need to find someone like this guy !
003 Scan Data for Fuel Code

Did you take pictures while removing the originals? It's always a good habit. Below are the instructions you need to follow. Your own pics are very helpful when doing a big job like this.

1. Disconnect negative battery (1) cable.
2. Drain cooling system.
3. Remove upper intake manifold.
4. Remove cylinder head covers, crankshaft vibration damper, and timing chain cover.

CAUTION: When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve and/or piston damage.

1. Align crankshaft sprocket timing mark to mark on oil pump housing (2). The mark on oil pump housing is 600 ATDC of #1 cylinder.

CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT rotate the camshafts or crankshaft without first locating the proper crankshaft position. Failure to do so will result in valve and/or piston damage.

1. Remove primary timing chain tensioner retainer cap (2) and tensioner (1) from right cylinder head.

1. Disconnect and remove camshaft position sensor (4) from left cylinder head.
2. Remove timing chain guide access plugs (3) from cylinder heads.

NOTE: When camshaft sprocket bolts are removed, the camshafts will rotate in a clockwise direction.

1. Starting with the right camshaft sprocket, remove the sprocket attaching bolts. Remove camshaft damper (1) (if equipped) and sprocket.
2. Remove left side camshaft sprocket attaching bolts and remove sprocket.
3. Remove lower chain guide (7) and tensioner arm (8).
4. Remove the primary timing chain (5).
5. Remove crankshaft sprocket (6).

INSTALLATION

1. Inspect all sprockets (4,9,11) and chain guides (2,5,10). Replace if worn.
2. For crankshaft sprocket installation procedures Refer to CRANKSHAFT SPROCKET.
3. If removed, install right and left side short chain guides (11). Tighten attaching bolts to 28 Nm (250 inch lbs.) .
4. Align crankshaft sprocket timing mark to the mark on oil pump housing (3).

NOTE: Lubricate timing chain and guides with engine oil before installation.

1. Place left side primary chain sprocket onto the chain so that the timing mark is located in-between the two (plated) timing links (1).

1. Lower the primary chain with left side sprocket through the left cylinder head opening.

NOTE: The camshaft sprockets can be allowed to float on the camshaft hub during installation.

1. Loosely position left side camshaft sprocket over camshaft hub.
2. Align timing (plated) link to the crankshaft sprocket timing mark (3).
3. Position primary chain onto water pump drive sprocket (10).
4. Align right camshaft sprocket timing mark to the timing (plated) link on the timing chain (8) and loosely position over camshaft hub.
5. Verify that all chain timing (plated) links are properly aligned to the timing marks on all sprockets.
6. Install left side lower chain guide (2) and tensioner arm (5). Tighten attaching bolts to 28 Nm (250 inch lbs.) .

NOTE: Inspect O-ring on chain guide access plugs before installing. Replace O-ring as necessary.

1. Install chain guide access plugs to cylinder heads. Tighten plugs to 20 Nm (15 ft. lbs.) .

NOTE: To reset the primary timing chain tensioner, engine oil will first need to be purged from the tensioner.

1. Purge oil from timing chain tensioner using the following procedure:

1. Place the check ball (2) end of tensioner into the shallow end of Special Tool 8186 (3).
2. Using hand pressure, slowly depress tensioner until oil is purged from tensioner.

1. Reset timing chain tensioner using the following procedure:

1. Position cylinder plunger (4) into the deeper end of Special Tool 8186 (3).
2. Apply a downward force until tensioner is reset.

NOTE: If oil was not first purged from the tensioner, use slight finger pressure to assist the center arm pin of Special Tool 8186 to unseat the tensioner's check ball.

CAUTION: Ensure the tensioner is properly reset. The tensioner body (4) must bottom against the top edge of Special Tool 8186 (3). Failure to properly perform the resetting procedure may cause tensioner jamming.

NOTE: Inspect the tensioner O-ring (2) for nicks or cuts and make sure the snap ring (1) is correctly installed, replace as necessary.

1. Install the reset chain tensioner (1) into the right cylinder head.
2. Position tensioner retaining plate (2) and tighten bolts (1) to 12 Nm (105 inch lbs.) .

1. Starting at the right cylinder bank, first position the camshaft damper (1) (if equipped) on camshaft hub, then insert a 3/8 square drive extension with a breaker bar into intake camshaft drive hub. Rotate camshaft until the camshaft hub aligns to the camshaft sprocket and damper attaching holes. Install the sprocket attaching bolts and tighten to 28 Nm (250 inch lbs.) .
2. Turn the left side camshaft by inserting a 3/8 square drive extension with a breaker bar into intake camshaft drive hub and rotate camshaft until the sprocket attaching bolts can be installed. Tighten sprocket bolts to 28 Nm (250 inch lbs.).
3. Rotate engine slightly clockwise to remove timing chain slack, if necessary.

1. Activate the timing chain tensioner by using a flat bladed pry tool to gently pry tensioner arm towards the tensioner slightly. Then release the tensioner arm. Verify the tensioner is activated (extends).

1. Install camshaft position sensor (2) and connect electrical connector.
2. Install the timing chain cover, crankshaft vibration damper, and cylinder head covers.
3. Install upper intake manifold.

NOTE: After installation of a reset tensioner, engine noise will occur after initial start-up. This noise will normally disappear within 5-10 seconds.

1. Fill cooling system.

P0321 Ignition/Distributor Engine Speed Input Circuit Range/Performance, hope it can help you!
____________
kess v2

Removal & Installation

3.5L Engine

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Record the radio anti theft code data.
3. Remove or disconnect the following:
   
   Negative battery cable Engine cover Accessory drive belts Idler pulley Crankshaft pulley Power steering pump pulley Belt tensioner pulley Upper and lower timing belt covers
   
4. Support the engine with a floor jack and remove the engine mount.
5. Rotate the engine to align the camshaft sprocket timing marks with the cylinder head cover timing marks.
   
   

   Fig. Timing belt routing and timing marks-3.5L Engine
   

6. Remove or disconnect the following:
   
   Auto tensioner Timing belt
   
   

   Fig. Timing belt and related components-3.5L Engine
   
   

To install:

1. Ensure that the engine is set to Top Dead Center (TDC).
2. Prepare the auto tensioner for installation by compressing it in a vise and installing a retaining pin.
3. Install the timing belt in the following order:
   1. Crankshaft sprocket
   2. Idler pulley
   3. Left bank exhaust camshaft sprocket
   4. Left bank intake camshaft sprocket
   5. Water pump pulley
   6. Right bank intake camshaft sprocket
   7. Right bank exhaust camshaft sprocket
   8. Tensioner pulley
   
   
4. Install the auto tensioner. Do not remove the retaining pin at this time.
5. Check that the crankshaft and camshaft timing marks are aligned correctly.
6. Rotate the crankshaft 1 / 4 turn Counterclockwise .
7. Rotate the crankshaft 1 / 4 turn Clockwise to return the engine to TDC.
8. Loosen the tensioner pulley center bolt.
9. Apply 44 inch lbs. (5 Nm) torque to the tensioner pulley as shown and tighten the center bolt to 32-41 ft. lbs. (43-55 Nm).
   
   

   Fig. Adjusting the tensioner pulley-3.5L Engine
   

10. Remove the auto tensioner retaining pin.
11. Rotate the crankshaft 2 revolutions Clockwise , then wait 5 minutes for the auto tensioner to adjust.
12. Measure the auto tensioner rod as shown. If the measurement is not 3.8-4.5 mm, then repeat the belt tensioning procedure.
    
    

    Fig. Measuring the auto tensioner rod-3.5L Engine
    

13. When the auto tensioner measurement is correct, install or connect the following:
    
    Engine mount Upper and lower timing belt covers Belt tensioner pulley Power steering pump pulley Crankshaft pulley Idler pulley Accessory drive belts Engine cover Negative battery cable
    
14. Reprogram the radio anti theft codes

For this problems,check the help links below,click the link to o through its troubleshooting procedure :-----Crankshaft and camshafts timing marks? http://technoanswers.blogspot.in/2012/02/crankshaft-and-camshafts-timing-marks.html---------- dual over cam timing mark details? http://technoanswers.blogspot.in/2012/02/saturn-vue-30-dual-over-cam-timing-mark.html---------- How to replace Adjustable Camshaft timing solenoid? http://technoanswers.blogspot.in/2012/02/how-to-replace-adjustable-camshaft.html------------ How to Inspect Camshaft? http://repairhelpcenter.blogspot.in/2012/02/how-to-inspect-camshaft.html

--------

camshaft Timing specifications? http://technoanswers.blogspot.in/2012/02/ford-mondeo-st220-camshaft-timing.html

-----------

Crankshaft Front Seal? http://schematicsdiagram.blogspot.com/2011/12/crankshaft-front-seal.html

----------

How test cam shaft? Testing Car Camshaft? http://repairhelpcenter.blogspot.in/2012/02/how-test-cam-shafttesting-car-camshaft.html

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How to service Cam Shaft? Camshaft servicing? http://repairhelpcenter.blogspot.in/2012/02/how-to-service-cam-shaft-camshaft.html

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How to replace Camshaft? Replacing Vehicles Cam Shaft Assembly? http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-camshaft-replacing.html

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For OBD code problems check the list of help links below. Click the link below to go through its procedure.

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Diagnostic Code P2195? http://schematicsdiagram.blogspot.in/2012/02/diagnostic-code-p2195-on-toyota-avalon.html

--------------
Diagnostic code P1330? http://technoanswers.blogspot.in/2012/02/diagnostic-code-p1330-on-kia-2wd.html

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Diagnostic code P0700, P1330, P1121? http://technoanswers.blogspot.in/2012/02/diagnostic-code-p0700-p1330-p1121-on.html

-------------
shows error code P1330? http://technoanswers.blogspot.in/2012/02/2003-kia-sorento-shows-error-code-p1330.html

--------
OBD code P1330? http://technoanswers.blogspot.in/2012/02/obd-code-p1330-on-2003-kia-sorento.html

------------
OBD code P01300? http://technoanswers.blogspot.in/2012/02/obd-code-p01300-on-toyota-rav4.html

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OBD code P0768? http://repairhelpcenter.blogspot.com/2012/01/obd-code-p0768.html

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Evaporative Emissions System codes details? http://schematicsdiagram.blogspot.com/2011/11/evaporative-emissions-system-codes.html --------------- Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

----------------

Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

--------------
ABS trouble codes for all models?

http://repairhelpcenter.blogspot.com/2011/11/abs-trouble-codes-for-all-1994-00-acura.html

------------
Diagnostic code P0010? http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-p0010.html

-------------
Diagnostic Code P1396?

http://howtobyme.blogspot.com/2011/11/diagnostic-code-p1396.html

--------------
Code P0452?

http://howtobyme.blogspot.com/2011/11/code-p0452.html

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OBD code P0172 on Buick?

http://howtobyme.blogspot.com/2011/11/obd-code-p0172-on-buick-park-avenue.html

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DTC Code P0321?

http://howtobyme.blogspot.com/2011/11/dtc-code-p0321-on-buick-park-avenue.html

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Error Code P0471?

http://howtobyme.blogspot.com/2011/11/error-code-p0471-on-2007-dodge-ram-3500.html

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P0304 Error code?

http://howtobyme.blogspot.com/2011/11/p0304-error-code-on-dodge-neon.html

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OBDII scan is receiving NO BUS CODE?

http://howtobyme.blogspot.com/2011/11/obdii-scan-is-receiving-no-bus-code.html

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How to Clear OBD error Codes?

http://repairhelpcenter.blogspot.com/2011/11/how-to-clear-obd-error-codes-on-acura.html

----------------
Diagnosis and Testing Car Components?

http://vwrepairhelp.blogspot.com/2011/11/diagnosis-and-testing-car-components.html

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Diagnostic Trouble Codes list?

Part 1.

http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura_18.html

--------------
Diagnostic Trouble Codes list?

Part 2.------

http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura.html

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OBD Code is cleared but check engine light will not RESET?

http://schematicsdiagram.blogspot.in/2012/02/obd-code-is-cleared-but-check-engine.html

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Diagnostic Code 43 and 71?

http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-43-and-71-on-1991.html

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Code P0132?

http://schematicsdiagram.blogspot.com/2011/12/code-p0132-on-acura-tl.html

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P0031 code?

http://schematicsdiagram.blogspot.com/2011/12/p0031-code-on-dodge-dakota.html

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How to get diagnostic Code without OBD Scanner on Pre 1995 cars?

http://schematicsdiagram.blogspot.com/2011/12/how-to-get-diagnostic-code-without-obd.html

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OBD-II Trouble Code P0300?

http://schematicsdiagram.blogspot.com/2011/12/obd-ii-trouble-code-p0300.html

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Getting diagnostic code P0016?

http://schematicsdiagram.blogspot.com/2011/12/getting-diagnostic-code-p0016.html

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How to Read Codes from Check Engine Light?

http://schematicsdiagram.blogspot.com/2011/12/how-to-read-codes-from-check-engine.html

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Diagnostic Code P0540 continues to return and the MIL light is on?

http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-p0540-continue-to.html

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DTC Trouble Code P0401?

http://schematicsdiagram.blogspot.com/2012/01/dtc-trouble-code-p0401.html

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Car misfires and error code P0306 and P0303 is shown?

http://technoanswers.blogspot.com/2012/01/car-misfires-and-error-code-p0306-and.html

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Diagnostic code P0463?

http://technoanswers.blogspot.com/2012/01/diagnostic-code-p0463-on-ford-f250.html

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Check engine light with codes P2195 and P2197?

http://howtobyme.blogspot.in/2012/01/check-engine-light-with-codes-p2195-and.html

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Diagnostic error code P0121,P0505,P1000,P2101,P2104, P2110,P2135,P2106?

http://technoanswers.blogspot.in/2012/01/diagnostic-error-code.html

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P0174, P0037 and P2197?

http://technoanswers.blogspot.in/2012/02/p0174-p0037-and-p2197-on-toyota-rav4.html

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P0352 Obd code?

http://technoanswers.blogspot.in/2012/02/p0352-obd-code-on-toyota-rav4.html

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Error code p0402?

http://technoanswers.blogspot.in/2012/02/error-code-p0402-on-ford-escape.html

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Obd Code P0763?

http://technoanswers.blogspot.in/2012/02/obd-code-p0763-on-lexus.html

-------
OBD code P0301, P0430 and P0174?

http://schematicsdiagram.blogspot.in/2012/02/obd-code-p0301p0430-and-p0174.html

---------
OBD code P0500?

http://schematicsdiagram.blogspot.in/2012/02/obd-code-p0500-on-lexus-rx-300.html

-----------

This will help.

Thanks.

1. Record the radio anti theft code data.
   
2. Remove or disconnect the following:
   
   Negative battery cable Engine cover Accessory drive belts Idler pulley Crankshaft pulley Power steering pump pulley Belt tensioner pulley Upper and lower timing belt covers
   
3. Support the engine with a floor jack and remove the engine mount.
4. Rotate the engine to align the camshaft sprocket timing marks with the cylinder head cover timing marks.
   
   

   Fig. Timing belt routing and timing marks-3.5L Engine
   

5. Remove or disconnect the following:
   
   Auto tensioner Timing belt
   
   

   Fig. Timing belt and related components-3.5L Engine
   
   

6. 
   

To install:

1. Ensure that the engine is set to Top Dead Center (TDC).
2. Prepare the auto tensioner for installation by compressing it in a vise and installing a retaining pin.
3. Install the timing belt in the following order:
   1. Crankshaft sprocket
   2. Idler pulley
   3. Left bank exhaust camshaft sprocket
   4. Left bank intake camshaft sprocket
   5. Water pump pulley
   6. Right bank intake camshaft sprocket
   7. Right bank exhaust camshaft sprocket
   8. Tensioner pulley
   
   
4. Install the auto tensioner. Do not remove the retaining pin at this time.
5. Check that the crankshaft and camshaft timing marks are aligned correctly.
6. Rotate the crankshaft 1 / 4 turn Counterclockwise .
7. Rotate the crankshaft 1 / 4 turn Clockwise to return the engine to TDC.
8. Loosen the tensioner pulley center bolt.
9. Apply 44 inch lbs. (5 Nm) torque to the tensioner pulley as shown and tighten the center bolt to 32-41 ft. lbs. (43-55 Nm).
   
   

   Fig. Adjusting the tensioner pulley-3.5L Engine
   

10. Remove the auto tensioner retaining pin.
11. Rotate the crankshaft 2 revolutions Clockwise , then wait 5 minutes for the auto tensioner to adjust.
12. Measure the auto tensioner rod as shown. If the measurement is not 3.8-4.5 mm, then repeat the belt tensioning procedure.
    
    

    Fig. Measuring the auto tensioner rod-3.5L Engine
    

13. When the auto tensioner measurement is correct, install or connect the following:
    
    Engine mount Upper and lower timing belt covers Belt tensioner pulley Power steering pump pulley Crankshaft pulley Idler pulley Accessory drive belts Engine cover Negative battery cable
    
14. Reprogram the radio anti theft codes.

here is the procedure for the tensioner:

1. Purge oil from the timing chain tensioner using the following procedure:

1. Remove the tensioner from the tensioner housing.
2. Place the check ball end of the tensioner into the shallow end of the Tensioner Resetting Special tool 8186.
3. Using hand pressure, slowly depress the tensioner until oil is purged from the cylinder.
4. Reinstall the tensioner into the tensioner housing.

1. Reset the timing chain tensioner using the following procedure:

1. Position the cylinder plunger into the deeper side of the Tensioner Resetting special tool 8186.
2. Apply a downward force until the tensioner is reset.
   WARNING Ensure that the tensioner is properly reset. The tensioner body must be bottomed against the top edge of the Tensioner Resetting Special tool 8186. Failure to properly perform the resetting procedure may cause tensioner jamming.
   

1. Install the chain tensioner into the right cylinder head.
   
2. At the right cylinder head, insert a 3 / 8 in. square drive extension with a breaker bar into the intake camshaft drive hub. Rotate the camshaft until the camshaft hub aligns with the camshaft sprocket and damper attaching holes. Install the sprocket attaching bolts and torque to 21 ft. lbs. (28 Nm).
3. Turn the left camshaft by inserting a 3 / 8 in. square drive extension with a breaker bar into the intake camshaft drive hub. Rotate the camshaft until the camshaft hub aligns with the camshaft sprocket and damper attaching holes. Install the sprocket attaching bolts and torque to 21 ft. lbs. (28 Nm).
4. If necessary, rotate the engine slightly clockwise to remove any slack in the timing chain.
5. To arm the timing chain tensioner: Use a flat-bladed prytool to gently pry the tensioner arm towards the tensioner slightly. Then, release the tensioner arm. Verify the tensioner extends.

Yes the shops technician got it right. as per the error code which you mentioned.These 2 codes are usually caused by a faulty crankshaft sensor (P0321) & possibly an ignition module (P1361). When replacing these parts part attention to the female electrical terminals in each connection. They will sometimes "spread" & cause an intermitten open circuit. Check each female electrical terminal with an opposing male terminal. There should be a small amount of "drag" when connecting the two of them. Thanks.Helpmech.