I just popped DTC code p2801 - trans range sensor B CKT Range/Perf.

I noticed it after redlining 2nd gear in my 2.4 auto. With the combination of my higher voltage to the e-rams and my Wester's tune the revs now jump to 7k where it shifts to 3rd. Not racing, just a normal WOT shift to get around a moron who can't drive. I hate idiots on front of you entering the freeway at 45mph when cars are whizzing by at 75-80. Who are they going to rear end? Not me.

Has anyone else gotten this code or know what it means?

Bumpety Bump Bump

 

i dont know but sometimes out of nowhere my traction control light will turn on and my tranny will start shifting really hard and fast. then its gone the next time i turn my car on.

 

what year is your car - nevermind, theres no 2801 code for any year cobalt. are you sure thats the right one?

 

That redlining in 2nd gears has happend to me a few times, i dont know if its normal though? it def has to do with the tune maybe i need to have less aggressive tcm tune... but i've never thrown any codes.

 

Yup, That's what the scan guage read. If it triggers again, I'll post up. But I think it's just a fluke. It shows up as a cavy code in the book. Wierd, I know. That's why I asked if anyone else experienced this anomoly. It's an 06 by the way.

 

well. GM Service Information doesnt show it as a code for cobalts so its probably nothing

 

mine does da samething too Celicacobalt.....my traction control comes on middle of no where and then when i turn it off it goes away when i turn it back on

 

Check your battery terminals for a tight, uncorroded fit. Also check the battery voltage at low rpm and with the engine off. Mine did this too - tc going on and off irratically all the time. It was a defective negative battery terminal. I replaced it with a new, conventional type terminal and problem solved.

When the computer experiences low voltage one of the first things it turns off to conserve power is traction control. Remember, GM (and other manufacturers) buys batterys from the lowest bidder, so the OEM battery is not the highest quality. Plus the battery can run down and sulfate at the dealer, while sitting on the lot.