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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have codes P0420, P0016, and P0106 what are they, I have

Customer Question

I have codes P0420 , P0016, and P0106 what are they
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: I have reset them but they came back
JA: What is the model/year of your Chevy?
Customer: 2004 trailblazer ext
JA: Are you fixing your TrailBlazer Ext yourself? What have you tried so far?
Customer: I'm trying to
JA: Anything else you want the mechanic to know before I connect you?
Customer: that's it for now
Submitted: 6 months ago.
Category: Chevy
Expert:  Super Mechanic replied 6 months ago.

Hello and welcome. My name is ***** ***** you for visiting the site, I am reviewing your question and will reply shortly, thanks.

Expert:  Super Mechanic replied 6 months ago.

P0016 The deviation between the crankshaft and the camshaft positions exceeds a calibrated amount.

P0106 The PCM detects that the MAP sensor voltage is not within the predicted range for more than 14 seconds

P0420 The PCM determines that the efficiency of the catalyst has degraded below a calibrated threshold.