Reduced Engine Power

[iamdub]

It is 5.3 non flex engine 2003 Tahoe. Yes "disconnect the nuance feature" that cause the "limp mode" or the "Reduce Engine Power" ( max 1500 rpm )

2003 is a changeover year- do you have DBW (Drive By Wire) or DBC (Drive By Cable) throttle body? If DBW, a scanner that'd show live data and capture a freeze frame when a code is set would be really helpful.

*EDIT* After looking up the two DTCs you posted, I'm sure you have DBW. Get a scanner and watch the TAC (Throttle Actuator Control) signals compared to the TPS positions. Example: TAC commanded 50% throttle, TPS reported 35%. Could be a very short-lived loss of coms, which could be a faulty wire in the system or a failing TAC module.

 

[Doubeleive]

2003 is a changeover year- do you have DBW (Drive By Wire) or DBC (Drive By Cable) throttle body? If DBW, a scanner that'd show live data and capture a freeze frame when a code is set would be really helpful.

*EDIT* After looking up the two DTCs you posted, I'm sure you have DBW. Get a scanner and watch the TAC (Throttle Actuator Control) signals compared to the TPS positions. Example: TAC commanded 50% throttle, TPS reported 35%. Could be a very short-lived loss of coms, which could be a faulty wire in the system or a failing TAC module.

I wish these were all still drive by cable I hate the freaking lag and the stupid traction control, I know how to drive I don't need a computer telling me how to do it.

 

[rockola1971]

I wish these were all still drive by cable I hate the freaking lag and the stupid traction control, I know how to drive I don't need a computer telling me how to do it.

That computer isnt there for you! I cant imagine you run into too much "fun" in California. That computer is there for those geniuses in Oklahoma that havent the slightest clue how to drive in "winter weather". Keep in mind they shut the town down when they get a 1/2" of snow. Now here in the true midwest (think IL, IN, MO, MI, WI, OH) that computer is there for all the geniuses that believe they can drive in 8" of snow and a whiteout happening or 1/2" of ice in 2hrs. The same geniuses that have put their vehicle in a ditch or up against something else that wasnt moving...atleast 3 times in their life.

 

[iamdub]

I wish these were all still drive by cable I hate the freaking lag and the stupid traction control

That's what tuning is for!

I know how to drive I don't need a computer telling me how to do it.

The CDT would beg to differ.

 

[tomloans]

I have to agree with IAMDUB. Not easy to drive any of these vehicles without traction control ( for that matter why bother ). I think some would be very surprised how quickly you can lose control without traction control. Personally I would rather have it and not worry. I know of one who thought they could handle it and lost it around a corner and have rolled down an embankment once they disengaged it. I recall one time, driving in cold weather that it engaged over some ice I didn't see - it was fortunate because I could have been in a serious accident. For sure on high performance vehicles, transaction control is critical for safety, even for those who believe they can drive without. Be careful. Over confidence can cost you your life.