P0017 Cam Crank Correlation Exhaust Cam

Darren Technician Wisconsin Posted   Latest   Edited  
Resolved
Driveability
2011 Chevrolet Traverse 3.6L (D LLT) 6-spd
P0017 — Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor B
MIL On

We are all fully aware of the notorius issues on this motor.

My question…..

I am tracking cam phasing operation during test drives with scan tool, it is always matching desired values on all

4 cams, always looking good and settling back to zero. Yet is sets the code after a few test drives.

Does this really not show up on a scanner?

I can break out the scope if I need to….

Do I bother scoping it when it looks good on scanner?

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Caleb Diagnostician
Indiana
Caleb
 

Scope it. Literally hundreds of known goods out there for this engine. Also after the P0017 sets there is no way VVT is active. All the VVT PIDs should go to 0 once the code sets on GM.

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Thanks
Darren Technician
Wisconsin
Darren
 

Just surprised it doesn’t show a problem on scantool…

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Jesse Owner/Technician
Georgia
Jesse
 

Are you using just the pids you need? Maybe a slow refresh rate keeps you from seeing the fault? I usually just do a movie and then check it on the computer so I can zoom in on it and hopefully find the concern.. Hope you find it best wishes and blessed day

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Glenn Owner/Technician
Texas
Glenn
 

Hi Darren, You can adjust the time base on a scope to capture problems that a scanner would not see. The typical scanner has a fixed and much slower time base, so it cannot catch fine glitches. An old school train of thought that works for me is using a DVOM (Good), then Scanner (Better), then scope (Best) if it is a difficult code setting issue. Keep in mind that even some scopes are better…

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Jim Educator
California
Jim
 

Morning Darren Let's start off with this, there is a cam crank (signal) correlation issue. You know that out the gate. Here is the threshold data: The ECM detects a deviation in the relationship between a camshaft and the crankshaft. The ECM detects the learned camshaft angle is greater than 10 degrees advanced or 10 degrees retarded in relationship to the crankshaft. OR The ECM detects the…

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Darren Technician
Wisconsin
Darren Resolution
 

scoped it, chain is needed. I will learn to upload screenshots and waveforms

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Scottie Owner/Technician
North Carolina
Scottie
 

Just curious. Couldn't you look a scan tool data and see cam variance.

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Darren Technician
Wisconsin
Darren
 

looked good on scanner and kept setting code. I knew I was missing something.

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