Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

transmissions DTC err.

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Old May 17, 2003 | 01:51 PM
  #1  
funina91ss's Avatar
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From: Huntington,WV
transmissions DTC err.

I dont get this untill its time to shifts then it hits the rev. limiter then I let off and it shifts to 3rd and seems like it stays in 3rd untill I turn the car off and back on.I have made over 30 passes with this setup and I dont think it is the 3k stall.

Here is the two dtc err. I get
22-TPS Sensor Low
72-Output Speed Loss

I am only getting 11.9-12.3 volts of charging mostly staying at 12.0 I am think this might be my problem. I moved my battery to the back and put in an optima red top 700 CCA battery. I am going to try to go with a bigger battery and make a better ground. I did notice when I first put the battery in the back it cranks slower and sometimes the head lights wont come up unless I turn the off and on again. TIA Sean
Old May 17, 2003 | 03:35 PM
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It could be the 3K stall.

DTC 72 is set when there's no signal (or faulty signal) from the Vehicle Speed Sensor. (which according to many, causes the high stall shifting problem)

Action taken: A delayed landing to third gear. Which is what is happening to your car.

Is the 12V with the engine running or not?
Old May 17, 2003 | 03:37 PM
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funina91ss's Avatar
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that is with the motor running using the data logger in real time
Old May 17, 2003 | 03:42 PM
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Hmm, yes the voltage does seem low. That's what it should be when the car isn't running. With the car running it could be up to 14 V or a little over. When you start the car, I've always seen 13+ voltages..
Old May 17, 2003 | 03:47 PM
  #5  
funina91ss's Avatar
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I have never had a shifting problem before thats why I think the voltage is causing it. its raining today or i would be out there working on it.

I have heard some talk about a manual vavle body or somthing to that nature that fixes the shifting problem any info on it?
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