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Just a PCM unconnect and re-connect?

Discussion in 'RT/10 and GTS Discussions' started by AFL in NJ, Jul 6, 2011.

  1. AFL in NJ

    AFL in NJ Enthusiast

    Posts:
    2,411
    Joined:
    May 13, 2006
    Location:
    Rancho Cordova, CA
    Hi Guys,

    My check engine light has recently come on, throwing the following codes:

    P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
    P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
    P0442 Evaporative Emission Control System Leak Detected (small leak)
    P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted

    I did a search and most of us had their 442 and 445 codes cleared with a PCM discconnect, then a re-connect....but I have a hard time believing I've lost both 02 sensors as well...anyone have any brighter ideas than I've come with via the search feature?

    Regards,
    Aaron
     
  2. GTS Bruce

    GTS Bruce Enthusiast

    Posts:
    3,327
    Joined:
    Dec 29, 2000
    Location:
    Orchard Park,NY,USA
    I have no cats and use syms for the rear O2 sensors. Lose all power to the PCM and it starts checking things from scratch. Without real O2 sensors you cannot pass the heat up test. I think its the first thing tested. You can unplug the syms,plug in the real sensors. Run for 5 minutes sitting at idle. The warm up is checked off and the fault is cleared. Then go back and plug in the syms again and all is well. Hope this helps and you figure it out. 2001 gts GTS Bruce
     
  3. Jack B

    Jack B Enthusiast

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    Location:
    NE Ohio
    Check the shop manual, they may be off of the same ground wire.
     
  4. AFL in NJ

    AFL in NJ Enthusiast

    Posts:
    2,411
    Joined:
    May 13, 2006
    Location:
    Rancho Cordova, CA
    Thanks gents! I have cats, so I had a hard time believing I lost both rear O2 sensors...and yes, the ground may be a perfect answer...I'll reply once I've figured it out.

    Regards,
    Aaron
     

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