SES light came on, lw300

Discussion in 'Saturn L-series' started by Oppie, Aug 26, 2004.

  1. Oppie

    Oppie Guest

    Got my first SES light this morning. After Jonnie Santos' problems, I wasn't
    taking this one lightly.
    2001, lw300
    Engine was running fine and exhaust smelled clean. No drivability problems
    but I read out the codes anyway. Don't have my own reader yet but the garage
    next door to my office lent me theirs.

    Only code logged was P0455 which showed EVAP leak (large)

    I thought that the gas cap might have come loose but it was on tight.
    Alldata shows a TSB related to this code. Anybody have any further info?

    01-T-02A FEB 01 Emissions - MIL ON/DTC P0440/P0455 (EVAP) Set

    I reset the code and light went off. Restarted the engine a few times and
    light stayed off so far.
    Am about halfway though the last tank of gas where I added a can of injector
    cleaner. This is the first time I used the cleaner. On past cars, I had used
    the cleaner every 6 months without problems.

    Oppie, Aug 26, 2004
  2. called today, and preliminary repair estimates are about $13k
    which far exceed the value of the car (so they've totaled it). Next week
    they'll make a settlement offer (they have to get another person involved in
    the process). Other than being a little slow, so far I think they're trying
    to do the right thing.

    Glad my loss served some purpose if for nothing else as to add another layer
    of caution in the diagnostic process.

    Is an EVAP leak like when a gas cap isn't on tightly and or the cap seal has
    Jonnie Santos, Aug 27, 2004
  3. Oppie

    Oppie Guest

    | Is an EVAP leak like when a gas cap isn't on tightly and or the cap seal
    | failed?

    The P0455 code came back today.
    Now I am incredibly pissed off!
    Having been a mechanic for years and being fairly competent, I can't even
    find the Evap canister. Having read most of the 5000 pages in the shop
    manual, I found them to be written from the standpoint of the tech who is
    armed with the factory service scan tool and concerned with little else.
    There are huge sections which equate diagnostic trouble codes to electronic
    faults (nice) but few diagrams to show where parts are located.

    I found the evap canister purge solenoid on the right front fender well. It
    is working OK. Can't find where the evap canister vent solenoid nor the
    canister are located. I have a sinking feeling that it is on top of the fuel
    tank and the tank has to be dropped to service it. There is a leak somewhere
    in the evap system. Fuel cap seems OK

    One would think that the manual would have some schematic diagram of the
    fuel system hoses and components. I can not find a useable one anywhere!
    This is my first service attempt on the car and I must say I am not

    There is a form in the back of the service manual for sending
    recommendations to Saturn about improvements in the manual. I intend to fill
    one out shortly. GRRRRR!

    Later - Oppie
    Oppie, Aug 28, 2004
  4. Oppie

    Blah Blah Guest

    Try looking under "V" for "Vapor Canister". {:D

    It might be in a fender or behind the gas tank. Ehh... I forget where it
    is on a L series.
    Blah Blah, Aug 28, 2004
  5. Oppie

    Oppie Guest

    | Try looking under "V" for "Vapor Canister". {:D
    | It might be in a fender or behind the gas tank. Ehh... I forget where it
    | is on a L series.

    Would have been much easier to find if I had the manual on disk that was
    searchable. The index in the print manuals is nearly non-existent. Think
    that I found the vent solenoid up near the fuel door. Found that by looking
    through 200 pages of connector drawings and found one marked evap vent
    solenoid. The drawing had a note about location being near fuel door. Still
    no clear indication where the canister is. Just have to trace out the hoses
    Still love driving the car but if this is what they mean by "a new type of
    car company" I am unimpressed with their service documentation.

    Think that I will try removing the purge solenoid and feed the canister line
    with 5 psi air and look for air leaks with soapy water. The vent solenoid is
    normally open (venting) unless powered and I can check it's electrical

    Also saw what is needed to change the timing belt. YIKES!
    Glad I have a welder and a machine shop to make all the special tools needed
    for alignment before taking off the old belt.

    Oppie, Aug 28, 2004
  6. Oppie

    Oppie Guest

    Evap canister is mounted on top of the gas tank "to make it tamper
    resistant" according to the manual. <yeah, right> If service is needed on
    this, you have to pull the intermediate exhaust pipe and drop the fuel tank.
    No nice service doors from topside :-((

    Evap canister vent solenoid is mounted behind the fuel door. I think that
    the valve had picked up a bit of dirt and was sticking open. There is a foam
    filter on its inlet but the housing was choked with dust. I have to question
    the sensibility of putting a vent behind the wheel well. With the vent
    circuit pinched off, the tank seems to hold pressure. Cleaned the filter and
    blew out the valve with air. Reset the code and will see again if the code
    gets set.

    There is also a pressure sensor similar to a MAP sensor mounted on the fuel
    tank. It is used in the evap diagnostics where the vent solenoid is
    energized to close it and the purge solenoid is energized to open it. A
    vacuum should be pulled in the tank and then the purge turns off to hold the
    vacuum. The sensor measures the rate of decay of vacuum in the tank to
    determine if all is ok or the magnitude of the leak.

    I have started annotating all the drawings in the shop manual similar to the
    way my Ford and Chrysler manuals were done. Much easier to follow that way.
    This is my first GM vehicle since I owned a '54 Olds 88 back in '65.

    Oppie, Aug 28, 2004
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.