» » »

Chevrolet Q&A

Ask Your Question

2000 Chevrolet Tahoe Question: Why does the code not return, until after a few days, after being reset?

 

Question

Dennis53, 5.3L V8, Woodbridge, NJ, May 05, 2014, 10:45
 Rookie

After inspecting the system and tightening the gas cap I reset the alarm via OBDII scanner. After a few days without any variable changes the alarm returns. My thought is that if there is an actual fault, then the alarm would return as soon as the vehicle is placed back into service. Why the multiple day delay? Codes P0440 & P0440Pd Chevy Tahoe 2000

2 Answers
Flag This
  • Answer #1

    G. T. Service Center (4218 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG May 05, 2014, 10:58
    Profile_thumbnail
     Master

    Once you clear it then when it runs the EVAP test it sees the fault again to alert you of the fault. Fix the problem and maybe it will stay off.

    Reply
    Flag This
  • Answer #2

    May 05, 2014, 17:20
    Profile_thumbnail
     Master

    Use your scanner to run an EVAP test...then check live data to view componets....may need to run a movie while driving.. then check freeze frame data..

    Flag This
  • Reply

    ProfessorG, May 05, 2014, 17:33
    Profile_thumbnail
     Master

    Chitty Chitty Bang Bang? Hummm

    Reply
    Flag This