My 03 Ford Crown Victoria Police Interceptor engine light is on, rattling coming from driver side cat. Is my cat bad?

Ford Crown Victoria Police Interceptor,

https://www.google.com/search?q=%E2%80%8BFord+Crown+Victoria+Police+Interceptor+canister+vent+valve+diagram

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fuse panel is below and to left of steering column by brake pedal fuse number 25 page 166 and 167 of owners manual following link is your owners manual for 03 crown vic
2003 Ford Crown Victoria Owner Manual

Ford Crown Victoria Questions - what would cause a whole ...

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CarGuruswhat would cause a whole car vibration when going between 48 and 65 mph, even ... Asked by Dfranz Aug 29, 2013 at 11:53 AM about the 2001 Ford Crown Victoria Police Interceptor ... You have an open diff by turning one wheel the driveshaft should turn before the .... 2007 Ford Crown Victoria Police Interceptor For Sale.

did u check ur passin gear cable

Notorious for intake leaks, the composite plastic intakes crack and leak coolant-as to the lack of power, you mght have overheated it and done some damage to the engine. There was a recall (information below) for the 4.6 for the intake-the overheating and lack of power means you should at least have compression checked and go from there-you may have bad head gaskets or worse. Do a compression test before you do anything else.

Ford Motor Company will extend the recall (01M02) on 4.6L V8 equipped vehicles with plastic intake manifolds. Some of the composite intake manifolds used on 4.6L SOHC engines may develop fatigue cracks at the coolant crossover duct. This condition could result in engine coolant leakage which, if not serviced, may cause engine overheating. Complete loss of coolant may result in engine damage or engine failure.
The updated recall now includes:
• Certain 1996 through 2001 Model Year Crown Victoria Police Interceptor
• Certain 1998 through 2001 Model Year Crown Victoria with Taxi
• Certain 1998 through 2001 Lincoln Town Car Limousine and Livery Prep Package
• Certain 1996-2001 Crown Victoria Taxis, Police cars and Lincoln Town Car Limousine and Livery cars.
• Certain 1996 through 1997 Crown Victoria Police Interceptor Vehicles with 4.6L SOHC engines built at the St. Thomas Assembly Plant from the beginning of production for the 1996 Model Year through January 28, 1997.
• Certain 1998 through 2001 Crown Victoria Police Interceptor Vehicles with 4.6L SOHC engines built at the St. Thomas Assembly Plant from November 22, 1997 through December 15, 2000.
• Certain 1998 through 2001 Crown Victoria Taxi Vehicles with 4.6L SOHC engines built at the St. Thomas Assembly Plant from November 22, 1997 through December 15, 2000.
• Certain 1998 through 2001 Lincoln Town Car Limousine Prep Package and Livery Vehicles with 4.6L SOHC engines built at the Wixom Assembly Plant from November 22, 1997 through December 15, 2000.

Sounds like a bad lighting control module. They were very problematic for '03.

Go to online store reliable they have repair manuals I am sure you will get the solution.
Here's the link
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it is DOHC

Yes they are as long as the Motors are Similar.