The P2106 code is set when the TAC system is in the Failure Mode Effects Management (FMEM) mode of forced limited power. This hard stop setting is not adjustable and is set to result in less airflow than the minimum engine airflow required at idle. The closed throttle plate hard stop prevents the throttle from binding in the bore. The default position is typically a throttle angle of 7 to 8 degrees from the hard stop angle. An internal spring is used in both designs to return the throttle plate to a default position. 2004 - 2008 Ford F150 - P2106 pd Code - My truck starts running rough or even stalls out some times after the little in dash wrench light comes on, been getting this code P2106 (TAC system forced limited power) on my OBD II 3.0 reader afterwards. Replace the throttle position sensor (TPS) following the instruction sheet included in the TPS service kit.
The inline design has a separate motor housing. Some vehicles built and prior may exhibit the wrench light on with both P2106 and P2135 diagnostic trouble codes (DTCs). The motor housing is integrated into the main housing. The parallel design has the motor under the bore parallel to the plate shaft. There are 2 designs for the TAC, parallel and inline. TP sensor 1 signal voltage decreases as the throttle opens.The electronic Throttle Actuator Control (TAC) is a DC motor controlled by the Powertrain Control Module ( PCM). TP sensor 2 signal voltage increases as the throttle opens. Two separate signal, low reference, and 5-volt reference circuits are used to connect the TP sensors and the powertrain control module ( PCM). The TP sensor is 2 individual TP sensors within the throttle body assembly.
The TP sensor is mounted in the throttle body assembly. Another exception is the throttle position (TP) sensor. One exception being the use of a motor to control the throttle position instead of a mechanical cable. The throttle body for the throttle actuator control (TAC) system is similar to a conventional throttle body with several exceptions. The accelerator pedal position (APP) sensorsĮach of these components interface together to ensure accurate calculations and control of the throttle position (TP). The TAC system components include, but are not limited to the following: This system also performs the cruise control functions as well. This eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. The Throttle Actuator Control (TAC) system uses vehicle electronics and components to calculate and control the position of the throttle blade.
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