Trac off, ABS, and check engine lights on, wont shift to 4th. Are they related ? on 1999 Oldsmobile Alero

Runs and shitfs good but has high RPMs dont feel like it is shifting to high gear.

by in Amarillo, TX on August 06, 2011
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2 answers
ANSWER by , August 06, 2011
Modern cars share the same sensors to operate fuel, ignition, transmission, traction control, brakes and cruise control. It is likely one sensor or circuit has failed causing multiply systems not to operate properly but a scan tool is required to retrieve trouble codes stored in the computer of your car.
ANSWER by , May 15, 2012
I have a 2002 Oldsmobile Alero, 2.2, 4 cylinder engine. I had to replace my transmission twice before I narrowed down the cause of my transmission hard shifting and high rpms. I had a faulty IAT (intake air temperature) sensor, and TPS (throttle position sensor). I also replaced the connections for both sensors. The sensors cost around $110 for both of them and it cured the hard shifting in my transmission. HTH.