Engine/Transmission/Performance Adders Chat about your engine, transmission, nitrous, superchargers, turbos, and tuning.
Sponsored by:
Sponsored by:

P0137 & p0171

Old 01-07-2018, 04:01 PM
Mastermiller's Avatar
Thread Starter
Join Date: Dec 2017
Posts: 11
Default P0137 & p0171

Here are the codes from my Elm-II and I have scanned it with a Bosch at the local parts store and used a friend's konwie. All the codes.
I have a 2002 Monte Carlo 3.4L and Now I'm curious about which one is the most likely cause of it running to Lean(P0171). I know I have a exust leak, So that's one issue resolved when I can replace the whole thing but I'm pretty sure this is not the main issue. Replaced 02 sensors last year with Bosch upstream and downstream sensors, Now I wish I went with A/c Delco since it's a GM.

I had the catlylic converter replaced last year with a magnaflow also since the honey comb was plugged up.

Any help would do for help on any code & Thank You.

Last edited by Mastermiller; 01-07-2018 at 04:04 PM.
Old 01-08-2018, 02:45 PM
Monte Of The Month -- April 2012
Monte Of The Month -- December 2014
10 Year Member
5 Year Member3 Year Member1 Year Member
Join Date: Sep 2008
Posts: 3,007

A faulting O2 sensor can make the car run lean.
Old 01-08-2018, 03:12 PM
ChibiBlackSheep's Avatar

Monte Of The Month -- August 2014
10 Year Member
5 Year Member3 Year Member1 Year Member
Join Date: Sep 2008
Location: Wyncote, PA
Posts: 24,822

Where's the exhaust leak? If it's before the sensor, you could be getting inaccurate readings and the car leaning out when it shouldn't.

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.