high shift points & high idle

[Red 99 T/A]

on these hot days, my t/a will develop really high shift points & idle higher, along with the TCS OFF light on, but it doesn't do it at night when its cooler outside. What could be the problem?

[PhantomHaZe]

anyone else have any ideas? I have the same problem.

Today was the first day it did this to me....we've had some real hot days lately here in St. Louis.

Drove fine all day with air conditioning on....I like to drive around with the ASR off and I came to a light...and upon accelerating once green, each gear was going up 3000 rpms instead of shifting around 2000 rpms, like normal. Which immediately felt weird. And once I park it in the garage, it also idled at around 1000-1100 rpms instead of the normal 500-600.

Could it just be the heat?

[Red 99 T/A]

my ses light came on, it threw 3 codes: tps low voltage, system lean (bank 1 & 2). probably the problem for both of us

[PhantomHaZe]

Possibly. My car returned to normal next time I took it out and has been fine since.

I have an SLP MAF and k've always thought that has played with my air/ fuel. So I'm planning on buying and oem one soon.

[Spaz]

i don't know much about transmissions but have you checked the fluid???

[Cutlass]

my ses light came on, it threw 3 codes: tps low voltage, system lean (bank 1 & 2). probably the problem for both of us

Before you even posted the codes, my first thought was TPS.