Question about Dodge Durango

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My wife went to leave work yeaterday but the car would jst turn over and not start. She finally got it to start after pressing the gas pedal. Then it would not shift out of first gear. Luckily i work for a toyota dealership so i was able to take a code reader home and pulled codes p0121 and p0123. Which i know means the tps sensor and i can repalce that. My question is can the tps sensor cause the trans not to shift.I tried to drive last night and the car is idling very high and trying to drive it i cannot get it out of first gear. Thanks

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  • chris leck Jan 30, 2010

    Thank you very much i have not replace the sensor yet but i am planning on it when i get home today. Thanks for verifying what my question.

  • chris leck Jan 30, 2010

    Great !



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Like most modern cars your Dodge uses an electronically controlled transmission.

The TPS (throttle position sensor) is used by the Computer Controlled Automatic Transmission to know how you are using the accelerator pedal.

This information is fundamental for the electronic automated transmission system to decide when to shift gear.

Information from TPS is sent to the TCM (transmission control module). The TCM is a computer module that will use info from TPS, along with info from VSS to decide when to send impulse to the Transmission Switch Solenoids to shift gear.

The car Revving high may be also consequence of the bad TPS.
If you replaced TPS already, do a new code scan.

Check also TPS wiring harness that can cause the two codes listed above.

Posted on Jan 30, 2010


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