Code 2784 Turbine speed sensor - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 3 (permalink) Old 09-08-2019, 10:14 AM Thread Starter
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Join Date: Oct 2017
Location: n.e. ohio
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Model year: 2008
Trim Package: Sport
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 200,400
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Code 2784 Turbine speed sensor

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
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post #2 of 3 (permalink) Old 09-08-2019, 12:27 PM
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Join Date: Oct 2017
Location: Evanston, IL
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Model year: 2010
Trim Package: Sport
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 100k
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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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Last edited by Legofan; 09-08-2019 at 12:35 PM.
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post #3 of 3 (permalink) Old 09-08-2019, 04:36 PM Thread Starter
Junior Member
Points: 1,660, Level: 23 Points: 1,660, Level: 23 Points: 1,660, Level: 23
Level up: 60% Level up: 60% Level up: 60%
Activity: 8% Activity: 8% Activity: 8%
 
Join Date: Oct 2017
Location: n.e. ohio
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 200,400
Posts: 22
Ok thanks for the info. Will check the plugs and injector at No.1 Didn't know that would follow to #3. Will post results in a couple days. Thanks.
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