Thread: Code P0174-too lean Questions

Reply to Thread
Results 1 to 8 of 8
  1. #1
    Viper Owner
    Join Date
    Dec 2006
    Location
    Lancaster, PA
    Age
    33
    Posts
    1,348

    Default Code P0174-too lean Questions

    I have a 99 GTS with a 10Lb Roe S/C on it. It has Ballenger headers,high flow cats and Corsa catback, Vec 2,water meth and Dual Walbro fuel system. CEL came on and it was code p0174- too lean on bank 1. Also had another code for the evap system, but I don't remember it. Cleared the codes but the Car still runs "rough" and seems bogged down, My AFR gauge is also reading richer than normal (sometimes 10.00). I'm sure the ECU is dumping fuel in since it sences a lean condition.

    Could it be a bad cat?
    Bad o2 sensor? I figured it would throw a different code though. Is there a way to test them?

    I've never data logged with the Vec 2, but I don't think I could anyways since the computer sits under the hood and I don't have a serial port on my computer. Can you data log on to a smart card? I'm guessing not, but I really dont know.

    Any ideas or suggestions?

    Thanks

    Colin

  2. #2
    Enthusiast

    Join Date
    Aug 2008
    Location
    Texas
    Posts
    316

    Default Re: Code P0174-too lean Questions

    Real time data stream will show a bank 1 o2 sensor that is constantly changing values. If the values change slow, then the o2 is malfunctioning.

  3. #3
    Viper Owner
    Join Date
    Dec 2006
    Location
    Lancaster, PA
    Age
    33
    Posts
    1,348

    Default Re: Code P0174-too lean Questions

    Could I see that at idle? or would I have to drive it and log? I think it's the whole closed loop/open loop thing.

    Thanks

  4. #4
    Viper Owner
    Join Date
    Dec 2006
    Location
    Lancaster, PA
    Age
    33
    Posts
    1,348

    Default Re: Code P0174-too lean Questions

    Bump.......

  5. #5
    Enthusiast

    Join Date
    Sep 2009
    Location
    Winkel, the Netherlands
    Age
    36
    Posts
    158

    Default Re: Code P0174-too lean Questions

    if you have the software you can put one end in the OBD2 plug and theother end can go in the laptop.

    You don't NEED a serial, just buy a serial > usb cable. Works perfect with my ease software and then just drive and make a log. If you need any help getting everything to work fine for logging, let me know.

  6. #6
    Enthusiast

    Join Date
    Jun 2001
    Location
    Enterprise, AL USA
    Posts
    10,315

    Default Re: Code P0174-too lean Questions

    Cut the cats, put in new front O2 sims.

  7. #7
    Viper Owner
    Join Date
    Dec 2006
    Location
    Lancaster, PA
    Age
    33
    Posts
    1,348

    Default Re: Code P0174-too lean Questions

    Talked to Sean at Roe and he's pretty sure it's a front o2 sensor. Will probably ditch the cats after I do my heads and cam. Thanks guys!!

    I'll let you know if replacing the o2 sensor works.

  8. #8
    Viper Owner
    Join Date
    Dec 2006
    Location
    Lancaster, PA
    Age
    33
    Posts
    1,348

    Default Re: Code P0174-too lean Questions

    Replacing the o2 sensor worked (went ahead and replaced both). Glad I had a wide-band and noticed it was running pig rich...The cats wouldn't have lasted long.

Similar Threads

  1. Help!! Lean machine S/C
    By SNKBYT in forum RT/10 and GTS Discussions
    Replies: 20
    Last Post: 05-26-2008, 09:46 PM
  2. Man i am lean, anyone else?
    By puma in forum RT/10 and GTS Discussions
    Replies: 12
    Last Post: 08-19-2007, 04:18 PM
  3. Running Lean
    By REDSLED in forum Sneaky Pete's Place
    Replies: 0
    Last Post: 10-22-2004, 09:11 PM
  4. Keeps going LEAN!!!!!
    By mrviper99 in forum RT/10 and GTS Discussions
    Replies: 5
    Last Post: 07-08-2003, 08:23 PM
Tags for this Thread

View Tag Cloud

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts