Trouble Understanding Codes

Tech discussions on the 3.6L V6 motor (LFX) used in the 2012 & up Caprice.
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Trouble Understanding Codes

Post by sardillim » Sun Feb 04, 2018 2:19 am

Trouble Understanding Codes
2012 Caprice 3.6 v-6
I have been getting the P0174 code, I have changed all 4 o2 sensors and the cam sensors ( previous code for the right bank intake sensor) I have also checked for vacuum leaks and everything seems ok. Currently and I am stuck, Dose anybody have any ideas ?
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Re: Trouble Understanding Codes

Post by smwalker » Sun Feb 04, 2018 6:15 am

Any Aftermarket stuff on the Car?

Since it is only bank 2 I would say MAF is not the culprit but would probably give it a good cleaning anyway.

May have to do a smoke check to see if any intake seals are bad.


Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White

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Re: Trouble Understanding Codes

Post by Capeasy » Tue Feb 16, 2021 3:10 am

You know I was just looking up those exact codes P0174, P0171. The stupid rubber boot or hose from my CAI keeps sliding off of the throttle body because it's some kind of weird Chinese rubber and when it does I get the check engine light on. So I have to pull over get my screwdriver out and slip that boot back on. I just got around to plugging in my Code reader to clear those two codes, I figured it's getting an obscured air reading when the MAS is taken out of the equation. Lol . It had me worried to because I seen "Lean" and I had just switched to E85.
Walt (AKA:Capeasy) So. Cal.
2013 Caprice 9C1,Huron white, Blackbear tune,DOD Delete, Texas Speed stage 2 cam with all the goodies, Circle D 258 mm converter, 3200 stall. Spectra CAI, 3.45 Diff, deep trans pan. BlackWidow Venom exhaust,Granatelli oval cutouts, Doug
Thorley tri-Y headers, Pedders coilovers,Tower brace,

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