03 mustang V-6 chirping sound coming from the camshaft synchronizer. What would cause this and how hard is it to replace/repair?

Did you reset the code after the replacement?

Camshaft / Crankshaft Sensor is the reason for the code. They come in different qualities. OEM is best, made in Mexico is the worst!

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P1336 2002 FORD F150 - Engine-Codes.com

https://www.engine-codes.com > p1336_2002_ford_f150
'P1336 2002 FORD F150 code possible causes · Faulty Crankshaft Position Sensor · Faulty Camshaft Position Sensor · Crankshaft Position Sensor harness is open or ...

have you check for trouble codes...blinking check engine light is for a misfire

If it is a belt noise, sprinkling baby powder on the belt will make the noise go away. Apply liberaly with engine off onto the belt and start the vehicle. The belt may have gotten coolant on it and this will cause the chirp. Also a defective belt tensioner will cause the belt to chirp

Help . Camshaft Sensor - Omfg ( Pics ) - Ford Explorer and Ranger ...

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Replacing Camshaft Synchronizer & Sensor - Ford Mustang Forum

www.allfordmustangs.com > ... > V6 TecCamshaft Position Synchronizer Replacement - YouTube? 1:16https://www.youtube.com/watch?v=fXOJXnYIZQkNov 18, 2009 - Uploaded by 2003FordTaurus2003 Ford Taurus 3.0L Vulcan 181K miles with chirping sound ... does the shaft move out of its place when ...Camshaft Sensor/Synchronizer Replacement - Page 5 - Ford Tru

I would venture to say if your not moving and the engine is idling. it would be you serpentine belt making the noise. It needs replaced.
I hope this is helpful.

I will tell you what I would do.
I looked up the part you speak of on the internet, and found it to be inexpensive.
Hence and therefore, I would purchase one and toss it into the glove box, for a spare.
I would also carry along the necessary tools to change it out.
I have had a few cars that have developed a chirp/squeak like yours had, and have found the same as you did.
Sometimes that is all that is needed, sometimes the noise returns.
God bless your efforts.

The camshaft sensor is mounted on a camshaft sycronizer (replaces distributor). Check for play up or down or back & forth. Most likely there is play & it will causes a chirping noise & burn out that new sensor prematurely. If there is play it will need to be replaced.

I would bet that there is a pully on one of the accessories that is about to stop turning. I would remove the belt and make sure that all of the acc. turn with out to much effort. I.E. altnator the tenstioner, as well as the a/c and idler pullys.

Ford has a technical service bulletin out for this concern number 03-21-23. Here is the information you need. Hope it helps.

ISSUE:
The 7.3L Direct Injection Turbo (DIT) engines are built with 0.1016-0.8128mm (0.0040-0.032") clearance between the Camshaft Position (CMP) Sensor and the trigger wheel. At approximately 1.016mm (0.040") clearance, the sensor will fail to synchronize and result in a no run condition. Improper CMP clearance can be seen in the following six (6) symptoms:

• 1) Fault codes - incorrect synchronization count
• 2) Low RPM - fails to achieve rated speed for 2-3 minutes after extended cold soak
• 3) No start - after extended cold soak
• 4) Runs poorly cold - engine runs OK warm
• 5) Stall on deceleration - more pronounced cold
• 6) Starts, runs cold, dies warm, will not restart until cool

ACTION: Install a shim between the CMP sensor and the front engine cover. The shim will allow the correct clearance which should reduce the possibility of concerns. Refer to the following Service Procedure for details.
SERVICE PROCEDURE

1. Perform normal DIT Powerstroke diagnostics. If no other problems are found, proceed with this TSB article.
2. Remove CMP sensor and inspect for signs of contact with the pulse wheel. Make sure the holes on the end are filled with epoxy and inspect the connector mating cavity for signs of oil contamination. If there are any signs of contact, contamination, or the holes are not filled, replace the CMP Sensor (F6TZ-12K073-A).
3. Repair symptoms 1) - 5) as follows: install a 0.254mm (0.010") shim under the CMP sensor. If symptoms persist, increase the shim thickness to 0.508mm (0.020") Shim (F7TZ-12J072-AA). NOTE: SOME ENGINES BETWEEN SERIAL NUMBERS 388840 AND 410010 HAVE BEEN BUILT WITH EXCESSIVE AMOUNTS OF TRIGGER WHEEL RUNOUT. RUNOUT OF THE TRIGGER WHEEL GREATER THAN 0.508mm (0.020") MIGHT NOT BE RESOLVED WITH A SHIM. THE ADDITIONAL CLEARANCE CAN PUT TOTAL CLEARANCE ABOVE 1.016mm (0.040") AND CAUSE FAILURE TO SYNCHRONIZE.
   
4. If symptom 6) occurs and trigger wheel runout is greater than 0.508mm (0.020"), try a 0.254mm (0.010") shim. If the concern is unresolved, replace the Camshaft Assembly (F4TZ-6250-A). Refer to the appropriate model/year Service Manual, Section 03-01C, for camshaft assembly replacement procedure.

PART NUMBER PART NAME F6TZ-12K073-A Camshaft Position (CMP) Sensor F7TZ-12J072-AA Shim F4TZ-6250-A Camshaft Assembly

You can drive the car nearly forever with these noise concerns, the trans noise which is the synchronizer ring may cause an issue in the long run, I have no clue what sensor they are talking about, but sensors don't make any noise, they are electronic parts.