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Posted on May 21, 2009
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Engine light came on after hard **** going up hill. Brought car to the dealer and they said nothing is wrong but these codes came up and now I'm wanting to know what these codes are

What do these engine codes mean? P1243 P0725 P0705

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  • 2 more comments 
  • mr_bigblock May 21, 2009

    So why would the check engine light just turn off atfer I started my car for a third time?

  • mr_bigblock May 21, 2009

    ok! well the car made a hard shift going but a hill and then the check engine light came on. But last week and also last fall when I would back out of my driveway then put the car in drive it would pretty well die when I stemp on the gas I would assume thats the P0725 code. So I guess I can just leave it until I die on the side of the road then! What do you think?

  • mr_bigblock May 21, 2009

    Thanks for all your help!!

  • Robert Yawn
    Robert Yawn Jun 09, 2018

    It's the 10amp back up fuse under the dash...I searched forever replaced all sensors... There's a a/t fuse in the same block but that back up light fuse also gives all electric power to the trans

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  • Posted on May 21, 2009
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P1243 - Inquiry Response Error - try reading codes again.
P0725 - Engine Speed Circuit Sensor Malfunction. - VSS or wiring bad.
P0705 - Transmission Range Sensor Circuit malfunction (PRNDL Input) - Sensor or wiring bad.


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  • 1 more comment 
  • Anonymous May 21, 2009

    some sensors need to be cycled 2-3 times (heated and cooled) to callibrate to the BCM.

    clear the codes using a OBD reader and see if they come back.

    Your BCM may be on its way out if it is misreading multiple sensor inputs. (p1243 code is telling).

    Check the BCM plugs for looseness as well.... if the plug is loose - the BCM needed to recallibrate the sensors (thinking they are new).

    You say it happened on a hard shift - so that tends to jiiggle things around a bit.



    :D

  • Anonymous May 21, 2009

    Reset the codes, and then re-read them if/when you experience another CEL condition.

    If its another P1243 - you'll need to look into replacing the BCM I think.

    None of these conditions will "leave you stranded" They are simply reporting a faulty reading from sensors not involved with the drivetrain or ignition.

    They are all transmission related - check the wiring harness for damage - corrosion - or bare wires as well.



    Thanks for using FixYa!

  • Robert Yawn
    Robert Yawn Jun 09, 2018

    Back up fuse 10amp in the same block under dash by a/t fuse... That also gives all power to the trans

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