Results 1 to 10 of 10

Help me figure this one out, please...

This is a discussion on Help me figure this one out, please... within the General Help forums, part of the LSx Technical Help Section category; Car has been missing intermittently lately, but it only comes at light throttle; Coasting or any more than a little ...

  1. #1
    Resident F1 Guru TGrits10's Avatar
    Join Date
    Oct 2001
    Location
    Fort Lauderdale, FL
    Age
    34
    Posts
    270

    NBM
    98 Z

    Question Help me figure this one out, please...

    Car has been missing intermittently lately, but it only comes at light throttle; Coasting or any more than a little throttle keeps it away.
    It seems to be related to heat somewhat, as it doesn't do it when the engine is cold, and does it especially when the engine is hot.
    I haven't noticed any change in gas mileage, btw.

    I stopped by Autozone and pulled the codes, here's what I got:
    -P0131 - O2 Sensor Circuit Low Volts Bank 1 Sensor 1
    -P1133 - Manufacturer Controlled Fuel + Air Metering
    -P0131(pd) - O2 Sensor Circuit Low Volts Bank 1 Sensor 1
    -P0161(pd) - O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 2

    The P1133 is a no-brainer thanks to the O2 sensor codes, and the P0161 doesn't look critical, so I'll ignore those two

    The real issue seems to be the P0131, which I have with and without the 'pd'. I take it the 'pd' is the equivalent of 'H' for 'historical'?

    OK so the obvious answer is that the Bank 1 pre-cat O2 sensor has gone bad, and replacing that will solve the problem.

    HOWEVER....

    I just replaced both pre-cat O2 sensors due to similar symptoms less than 10k miles ago, late last year IIRC. So I'm thinking there's something else going on that is eating my Bank 1 O2 sensors (last time only the Driver's Side sensor was black with carbon, the passenger side one looked fine, but I replaced it anyway.).

    SO....

    What could be eating my O2 sensors without causing any other symptoms or throwing any codes (Assuming the dying sensor is to blame for the miss)??????

    TIA, this computer-controlled ignition stuff routinely baffles me....

  2. #2
    Senior Member ninobrn99's Avatar
    Join Date
    Aug 2003
    Location
    Honolulu HI
    Age
    33
    Posts
    2,486

    Pewter
    all bore 370 Trans Am

    are you sure the wires didnt get burnt on the harness itself? do u have o2 extensions? if so, move it over to the pass. side and see if it follows..

  3. #3
    Resident F1 Guru TGrits10's Avatar
    Join Date
    Oct 2001
    Location
    Fort Lauderdale, FL
    Age
    34
    Posts
    270

    NBM
    98 Z

    Quote Originally Posted by ninobrn99
    are you sure the wires didnt get burnt on the harness itself? do u have o2 extensions? if so, move it over to the pass. side and see if it follows..
    hmmmm

    no O2 extensions, but it's possible the wire could be damaged, I haven't looked at that. How much of a PITA is it to swap the harnesses side to side??

  4. #4
    Senior Member ninobrn99's Avatar
    Join Date
    Aug 2003
    Location
    Honolulu HI
    Age
    33
    Posts
    2,486

    Pewter
    all bore 370 Trans Am

    the harness itself, i dont know. i think if its messed up, your gonna have to cut, soilder and shield it. It could be that the wire is exposed and touching on something that keeps shorting out the sensor..

  5. #5
    Resident F1 Guru TGrits10's Avatar
    Join Date
    Oct 2001
    Location
    Fort Lauderdale, FL
    Age
    34
    Posts
    270

    NBM
    98 Z

    hrmmmm....I guess I'll replace the sensor since it'll need it anyway, and while I'm under there I'll give the harness a real good once over. Worst case scenario I guess is I never figure out what's eating my O2 sensors, and I have to replace one now and then.

  6. #6
    Senior Member ninobrn99's Avatar
    Join Date
    Aug 2003
    Location
    Honolulu HI
    Age
    33
    Posts
    2,486

    Pewter
    all bore 370 Trans Am

    screw that! they cost too much to look at it that way. good luck figuring it out though.

  7. #7
    Resident F1 Guru TGrits10's Avatar
    Join Date
    Oct 2001
    Location
    Fort Lauderdale, FL
    Age
    34
    Posts
    270

    NBM
    98 Z

    well yeah $100 is $100 (or however much they cost, I forget). But put it in perspective. If I replace one every 10k miles, that's once every 40 tanks of gas. Call it $40 for a tank of gas, that's $1600, so with the O2 sensor as a consumable it's $1700...not a big difference.....of course that's assuming it lasts 10k miles, which it may not. What if I have a bad coil or injector or something hard to find like that? I've chased crap like this before, it's so much stress and frustration, if the problem isn't obvious (like a nice helpful computer code or a scorched O2 harness), I'd just as soon buy a sensor now and then to avoid dealing with it.

  8. #8
    Life in the Fast lane sunsetorangess's Avatar
    Join Date
    Aug 2005
    Location
    Bragg NC
    Posts
    2,835

    Met. Sunset Orange
    01 SS

    lol good outlook but if you catch a problem while its small you can fix it but if you let it go it could lead into bigger more expensive problems.
    2001 SS, Its not the car its the Driver that matters....

  9. #9
    Crinkle, Crinkle
    Join Date
    May 2006
    Location
    Warren, MI
    Posts
    68

    Red
    2001 Camaro SS

    Spark plugs and leads? Silicone gasket sealant? Oil consumption? Air filter leak? Injector sticking open?

    Have fun,

    --97T--

  10. #10
    Resident F1 Guru TGrits10's Avatar
    Join Date
    Oct 2001
    Location
    Fort Lauderdale, FL
    Age
    34
    Posts
    270

    NBM
    98 Z

    Quote Originally Posted by NinerSevenTango
    Spark plugs and leads? Silicone gasket sealant? Oil consumption? Air filter leak? Injector sticking open?

    Have fun,

    --97T--
    Heh, yeah. That's exactly why I'm not chasing this one. I don't plan to keep the car much longer, and it could be anything....so it's much less headache to just replace the sensor whenever it's needed.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

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
  •