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		Automotive Forums Car Chat > Ford > Mustang > Mustang Problem Diagnosis
po420

Mustang Problem Diagnosis Got a problem you can't fix? Post here and one of our members will answer as soon as possible.

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#1

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12-21-2008, 02:05 PM

mikemangone mikemangone is offline

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po420

I have a 1994 ford mustang
and I have a check engine light that comes on every now and then.

i did a test thing and it gave me the code

po420.

the car runs fine its just the check engine light comes on.

I don't know anything about cars, this is my first one.

Thanks for any help!
-Mike.

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#2

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12-22-2008, 03:39 AM

Davescort97 Davescort97 is offline

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Re: po420

Welcome to AF. P0420 is catalyst system below threshold.

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