Engine power reduced???

[tboImpala]

I was driving on the highway to work this morning when all of the sudden I my Impala slows down. I look at the dash and it says "engine power reduced" What does this mean?

[maxwedge]

The pcm sees a misfire or other operating anamoly that causes it to reduce operating power to save the engine or catalytic convertor, should be a code stored, get it scanned.

[Tech II]

That usually happens when there is a TAC code set from the throttle body....

[tboImpala]

If you buy the trottle body from autozone do the sensors have to be reprogrammed? Or does it come already set?

[wendylmcgill]

sometimes the check engine signal comes on-then later the message that service traction control and engine power reduced comes on, and the car slows and is hard to accelerate-but does not happen all the time-how do I fix without paying an arm& leg at a dealer??

[maxwedge]

What car is this? Have you had it scanned?

[wendylmcgill]

I am sorry for jumping in-my first time on the site-2008 Impala v6
I was told it was the throttle sensor-but had to replace the whole unit

[maxwedge]

Again what was the code, we cannot begin to help you with no info to work from.