While on my 20 mile commute my check engine light turned on, attached the code reader to the car and got codes P0422 and U0D00. Looked up the P0422 code to find "Caralyst efficiency below normal (bank 1)" I have a list of possible fixes but have no luck finding out about the U0D00 code. I notice I lose and a quart of oil every month and when I start the car, the first 5 seconds or so the engine revs to 4000 rpm. Any idea what might fix this?
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