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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29522
Experience:  GM Grand Master Technician 2007. 14 years experience.
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My name is ***** ***** the issue is oil in the intake

Customer Question

Customer: my name is ***** ***** the issue is oil in the intake manifold . my question is could this set a P101 code ?
JA: Thanks. Can you give me any more details about your issue?
Customer: I have came across this issue before on earlier model Chevy having the pcv baffle plugged .i know this is part of my problem on this 04 Chevy with a 5.3 . I have a check engine light on code P101 Mas air flow sensor test good , map sensor test good so my question would be could the excessive crank case pressure result in the P101 code.
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Submitted: 1 year ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 1 year ago.

Hi there, I am Cam.

Oil in the intake should not set a P0101. That code is specific for mass air flow performance. Things like a dirty mass air flow sensor, plugged air filter, plugged exhaust. Air leak after the sensor or at the intake will all cause this issue.

Oil in the intake sounds more like a baffle issue in the drivers side valve cover.