Jeep Wrangler 2008 3.8 limp mode

Aly Diagnostician Congo City, Congo Posted   Latest   Edited  
Unsolved
Opus IVS
Electrical
2008 Jeep Wrangler Rubicon 3.8L (1) 6-spd (NSG370)
P2112 - Throttle Actuator "A" Control System - Stuck Closed
Limp Mode
No Reaction From The Throtle Body

Hi,

When i start engine if i push the pedal sensor, rpm move to …,but the throtle plate not moving and still completely closing .without starting engine if i turn ignition on ,the throlte moves towards open position only 10% then it comes back to its close position.

plz help

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Edward Owner
San Antonio, Texas
Edward Default
   

Looks like a faulty throttle body, before ruling it out I would check power supply grounds and signal feed.... Pin 5 is PWM 12V and Pin 3 Ground to open pin 5 is PWM Ground and Pin 3 is 12V to close Voltage should move up and down as throttle is opened and closed TPS 1 will go from low to high and 2 will go from high to low the sum of the voltages from both sensors should equal 5v at any…

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Samuel Technician
Somers Point, New Jersey
Samuel Default
 

Edward answered this thoroughly!!! If you deduce that it is the throttle body, don't be afraid to pull the trigger! (these do fail)

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Geoff Diagnostician
Lahaina, Hawaii
Geoff Default
   

If it's not physically binding, which you can check with your fingers, as long as you UNPLUG it first, then usually the ECM sees a current pattern it does not like (through the motor circuits) and concludes that it is binding. If you really enjoy playing with a scope you can current ramp those TAC motors just like any other motor. Just use a power probe to activate the motor for a split second…

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