Codes, what should I do here?

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September 1st, 2009, 9:09 PM

#21

lukemoore646

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Location: Munden Kansas

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you mean the catalyst efficiency code?

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April 4th, 2010, 8:57 PM

#22

jimg2347

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My 99 Yukon was misfiring and set a po300 code. Changing the pick up coil in the distributor solved the problem. 30 dollar part and if that is not the cause, call it preventive maintenance.

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April 4th, 2010, 9:20 PM

#23

s34n

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Location: sacramento,ca

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does your truck have a cap and rotor or coil over plug configuration?

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April 11th, 2010, 10:50 AM

#24

jimg2347

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It has a cap and rotor.

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April 11th, 2010, 12:03 PM

#25

xpeder

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replace the back ocygen after the cat some the back sensor get lazy

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