APS TT is in, and it threw one code. Is this just a learning thing or did I break something?????

DTC P1121 ELECTRIC THROTTLE CONTROL ACTUATOR

Component Description
Electric Throttle Control Actuator consists of throttle control motor, throttle position sensor, etc.

The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throttle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

On Board Diagnosis Logic






Fail-Safe Mode





When the malfunction A or B is detected in

Thanks, and happy boosting

 

Did you do the throttle position learning after you completed your install?

Unplug the throttle body, unplug the battery (reset ecu), and go through the throttle positition learning steps. If it continues to be a problem, you may need to replace the throttle body. gotta love drive by wire

 

Awesome, thank you. yes we did do that, but I will try it again. How much do new TB's run? I was hoping that maybe it would relaern as I drive being how I did those steps to a T!

 

new throttle body is around 600 bucks or so


I have a contact that might be able to get you a used one for 250 if you want to risk it. I already replaced mine and I know it's very common for them to go.

 

What is the reson they go out? We were extremely careful with all the factory parts. What will happen if I keep it as is? I do not feel anything wrong with the throttle or the engine...

 

throttle position sensors go out. I don't know why, just a common occurance with drive by wire. You cannot just replace the sensor unit, you need to replace the entire throttle body.

Don't worry about it yet, reset it and see what happens

 

reset and all is good I brought her home tonight and I had no issues whatsoever Thanks for the help on that, we just did the reset. Question though, does your vdc just give up after a while of pushing the car?

 

Enthusiast model = no vdc

I have to keep the TCS off though, at 1/2 throttle it just has no idea what to do.

Glad the reset worked...enjoy