GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 7 of 7
  1. #1
    Legend

    Join Date
    Feb 2008
    Location
    Red Wing, Minnesota, United States
    Posts
    3,356

    Default Codes P0452 and P0453

    I have got the 453 before but this is the first time for the 452, do I really need to change a sensor? Will this low input on the sensor really hurt anything?
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
    ___________________________
    Jason

  2. #2

    Default

    It will keep your check engine light active and will keep your OBD checks incomplete. The 452 is low input and the 453 is high input. So something is screwy with the sensor. Have you ever changed it?
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3
    Legend

    Join Date
    Feb 2008
    Location
    Red Wing, Minnesota, United States
    Posts
    3,356

    Default

    Have never changed it, I reset them last night and they havent come back on yet. Wouldnt even know whee to start with them.

    Jim, is this the correct one?

    http://www.oreillyauto.com/site/c/de...PartType=C0033
    Last edited by vncj96; 10-30-2009 at 09:07 AM.
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
    ___________________________
    Jason

  4. #4

    Default

    Quote Originally Posted by vncj96 View Post
    Have never changed it, I reset them last night and they havent come back on yet. Wouldnt even know whee to start with them.

    Jim, is this the correct one?

    http://www.oreillyauto.com/site/c/de...PartType=C0033
    I've never changed one of those so I can't answer your question. Maybe someone else has?
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  5. #5
    Legend

    Join Date
    Feb 2008
    Location
    Red Wing, Minnesota, United States
    Posts
    3,356

    Default

    Ok so the light came on again and then went out by itself, and I have noticed my MPG has dropped for this tank, does this sensor take the place of the fuel pressure regulator or what does it actually do?
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
    ___________________________
    Jason

  6. #6

    Default

    The EVAP system is completely separate from the fuel system, so it has nothing to do with the regulator.

    If you follow your fuel lines, you will find three lines off of the tank: 1 is the fuel supply line (from the pump to the engine), 2 is the fuel return line (from the regulator to the tank), and 3 is an EVAP line. As the tank breathes (so you don't a vacuum or pressure built up in the tank), the EVAP systems job is to make sure the gasoline vapors from the tank end up going to the intake so they can be burned. The pressure sensors are there so the computer knows if the EVAP system is doing its job correctly.

    I haven't had to do anything with my EVAP system, yet, so I'm not real familiar with it either. Go down to your library and find entries 2 and 3 in the following list http://ipac.selco.info/ipac20/ipac.j...ll&Search=Find
    Look through the Mitchell manuals and see if they have the "light truck engine performance, diagnosis, and troubleshooting" manual for your year (or near your year). In there, you should find complete diagnostic and repair information for your codes.
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

  7. #7

    Default

    Quote Originally Posted by vncj96 View Post
    Ok so the light came on again and then went out by itself, and I have noticed my MPG has dropped for this tank, does this sensor take the place of the fuel pressure regulator or what does it actually do?
    Short Answer: The sensor measures pressure inside the tank. It tells the PCM there is a leak if it sees one.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

Similar Threads

  1. p0452
    By agreene603 in forum General Chevy & GM Tech Questions
    Replies: 3
    Last Post: 02-18-2012, 10:57 AM
  2. RPO Codes
    By jjump in forum Audio, Video & Gadget Tech
    Replies: 0
    Last Post: 06-28-2010, 12:09 PM
  3. What should I do about these codes
    By hkinsland in forum General Chevy & GM Tech Questions
    Replies: 2
    Last Post: 03-16-2009, 03:26 AM
  4. help have u and p codes what to do
    By johnpimentel72 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 7
    Last Post: 06-30-2008, 08:32 AM

Tags for this Thread

Posting Permissions

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