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Code 2784 Turbine speed sensor

4K views 3 replies 2 participants last post by  medwards 
#1 ·
My 08 Commander will not go over 25 mph . It also did not start a couple of times then it did. After sitting for a day, now it drives fine , but what will it do next. I thought it was the cat converter. Now it is showing misfire and circuit open on No.1 cylinder. It is ;the 3.7 v6. Where do I start. Thanks
 
#2 · (Edited)
An input/turbine speed sensor / turbine speed sensor / TSS is an electromagnetic device that the engine control unit (ECU) uses to monitor the transmission input shaft speed/RPM. If a DTC is present, it means that the signal coming from the transmission input speed sensor does not meet the computer’s programmed parameters.


Causes


  • Failed TSS sensor
  • Damaged turbine speed sensor wiring
  • Faulty connectors
  • Failed solenoid
  • Valve body issues
  • Dirty transmission fluid


As for the misfire on Cyl #1 I would pull the coil and move it to cyl #3 and see if the misfire follows it. Lets do that first.
 

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