How do you repair po446 trouble code on a 2002 pont grand am gt 3.4 l

P0466 OBD-II Trouble Code: Purge Flow Sensor Circuit Range/Performance. P0466 means the EVAP system is not functioning properly. This could be due to a faulty part in the system or on the fuel cap

No Crank Reference Signal at PCM No reference signal (crank-shaft position sensor) detected during engine cranking. Use this youtube step-by-step to fix it. How to diagnose P0320 crankshaft position sensor circuit failure

they are the coil packs

Here is the trouble tree for that code it is most likely a bad cat but follow the trouble tree to see where it lead's you.
DTC P0420 or P0430

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Diagnostic Starting Point - Vehicle
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0420

* Catalyst System Low Efficiency Bank 1

Important: A new converter with less than 100 miles on it may set DTC P0420 or P0430 due to out-******* of the internal matting. Operating the vehicle at highway speeds for approximately 1 hour may correct the condition. Hope this helps

Fuel Filter

2001 camry code po440,po441,po446
what kind of problem and how can be solved
sam

1st thing to do is have a test run for trouble codes, Kragen auto and others do this for free, post the codes back here and I will look at them and give you some idea of the possiable problem(s)

turn key to ON position wait 10 min untill security light stops flashing and dissapears then hit unlock 3 times then start

if you can remove the exhaust pipe its gonna be noisy like hell but right away you gonna see the differense good lock

P0446 is an EVAP code.Charcoal canister vent control valve; commonly located under the trunk, at the canister.