Oil cap breather
02-04-2012, 01:32 PM
#1
Staging Lane
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Location: TX
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Oil cap breather
Recently installed a oil cap breather and my check engine light came on. Any ideas? It's an 06 silverado 4.8. Codes are P0171 & P0174
Thanks in advance
Thanks in advance
Last edited by RST302; 02-04-2012 at 01:57 PM.
02-05-2012, 03:21 PM
#2
Pull the breather off and it will solve your problem. What is happening is it is allowing unmetered air to be pulled in through your PCV system, which is why it is setting codes. The only time you will want to run a breather on your truck is if you block off the PCV and run a catch can setup.
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