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Loren

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Posts posted by Loren

  1. CEL just went on.  Code PO153 came up.  According to the RennTech info. that describes an "aging oxygen sensor ahead of TWC cylinders 4-6." 

    :(  Help, what is the difference between code PO153 "aging" oxygen sensor ahead of TWC cylinders 4-6 and code PO150, "oxygen sensor ahead of TWC cylinders 4-6?"  What is the aging process like for an oxygen sensor? Is this aging code telling me that soon there will be a code PO150 where the sensor fails?   

    How serious is this aging code, can I still drive the car for a while and how soon should the sensor be replaced?   

    Thanks ahead of time!

    -Gary in Montana

    Here is what the OBD II manual says about P0153:

    The diagnosis of "oxygen sensor aging" helps to identify oxygen sensors that exceed emission limits because of aging.

    During the diagnosis of oxygen sensor aging, the DME control module monitors the period of the sensor signal.

    With an old sensor, the duration of the period is too long, i.e. it is more difficult for the sensor to diffuse oxygen into the exhaust gas. Reasons for this could be frequent driving in the lower load range (city driving, short distances, etc.) or a contaminated sensor.

    They go on to suggest that you reset the code and if comes back replace the oxygen sensor.
  2. I would try it without removing the ball joint first. Remove the swaybar first to relieve the pressure. If you can get the wheel hub down enough to get the old strut out (and the new strut in) then you won't need it.

    If you end up needing it then just buy or rent a ball joint tool (that fits Porsche).

    post-2-1118461966.gif

  3. Did you look at the manual transmission DIY here? I guess we could add it there?

    The front differential is another .9 liters.

    1. Remove front underside panels.

    2. Place oil collection pan under the front wheel drive.

    3. Unscrew oil filler screw A.

    post-2-1118425511.gif

    4. Unscrew oil filler screw B and drain transmission oil.

    post-2-1118425540.gif

    Refill and torque both screws to 21 ftlbs. (28 Nm)

  4. Plugs 1 and 4 are the tough ones since the exhaust is partly in the way. Those two will taken as long to remove as the other four put together.

    The right tools are essential to removing the spark plugs. I use a ball-socket hex wrench (or do you say spanner?) for the coils. The plugs will need a small 3/8 inch drive socket wrench, a 4 inch "wobbler" extension and of course a deep spark plug socket. For plugs 1 and 4 you might find it easier to loose the spark plug then remove the wrench and wobbler extension and then use the extension (or a shorter one) to pull the plug and the plug socket out.

    Yes, the coils are just that. Did you notice that most modern auto designs no longer have one large ignition coil? The coil packets now do this individually. So, if you have a cracked coil - by all means replace it.

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