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  1. 11-16 LML Duramax Powertrain
    So this is driving me crazy; I had a shop here in California (yes, full smog check state) replace the 9th injector and a forced regen after a reacurring CEL for the P0420. Also had a oxygen sensor replaced just months before. So, no more light the the "permanent" code won't clear. No lights on...
  2. DIY and Tech discussion
    I checked my truck this morning with the scanner and saw it had a U1067 code which is for lost communications with body multiple control system. But so far everything I can tell is fine. Any ideas on what it could be
  3. Drivetrain
    While driving home from work I noticed my truck did not want to shift correctly, it actually failed to shift at one point and I had to put it in neutral to reset and then back into Drive to continue driving. I attempted to use tow haul to utilize the Torque Converter more to save stress on the...
  4. 911 Problems Forum
    (TDFDiesel) Edit: Here is a free resource shared by a member. It appears to offer DTC codes by manufacturer with further documentation for Troubleshooting. My initial reviews looked like it was an extensive database. Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis I did not...
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