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My first Check Engine Light

   
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Old 09-30-2014, 12:03 AM
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Default My first Check Engine Light
I guess my brand new truck is no more. After 83,000 miles I saw my first CEL last night. It throws the P0421 code. Reading up on these codes is useless. There are half a dozen culprits. Is there one primary suspect?
 
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Old 09-30-2014, 07:25 AM
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Originally Posted by DakotaAgain?
I guess my brand new truck is no more. After 83,000 miles I saw my first CEL last night. It throws the P0421 code. Reading up on these codes is useless. There are half a dozen culprits. Is there one primary suspect?

P0421 Warm Up Catalyst Eff Below Threshold Bank1 is what I read. I think most will suggest that you disconnect the battery overnight to clear the codes and try again. Could be one of those darned things.
 
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