Starting the car usually brings up the "reduced power" light almost every time and the only way to fix it is to shut it off and restart it. we just replaced the throttle body and went thru all the relearning processes to try and fix but it still happens.

 

What codes?

 

we havent recorded it since the relearning processes, but the ones that showed up before were:

P2176
P2101
P2119
P0638
P2100

So if any of those are related to the relearning count them out

 

P2176 Throttle Actuator Control System - Idle Position not Learned
P2101 Throttle Actuator “A” Control Motor Circuit Range/Performance.”
P2119 Throttle Actuator Control System - Idle Position not Learned.
P0638 Throttle Actuator Control Range/Performance (Bank 1)
P2100 Throttle Actuator Control System - Idle Position not Learned

I'm thinking the relearn process for the throttle actuator control system was not successful.

Here's what I found for the procedure, although other sources say it must be done with a tech 2 at the dealer. I would venture to guess that a powerful enough scanner could do this as well. But the following is supposedly the manual process.

I find it interesting that it starts by telling you to turn the key to off as the first step. I don't know if that means that the key should be on with the engine running or on with the engine off but as long as you meet the specs in the test either seems it would be okay.

 

Clear them and see what resets.

 

Thinking they already did, as that is performed twice as part of the relearn procedure and is the last step.

Can't hurt.