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my 1999 buick century won't shift gears on 1999 Buick Century

I have just repaired the lower and upper intake problem and then my starter acted up, and and when i went to test drive it the transmission won't shift , it will move but it stays in 1st gear, revearse works fine.if anyone has a answer please tell me as i can't afford a new car right now

Check engine light on? It should be!
yea it's on,I put code reader on it and it showed the tps sensor
That's your shift problem!! Recheck your work for a pinched wire to the tps etc...Tps signal has a mojor effect on trans shift.!!!!!
thanks for the advise the tps fixed the problem
Glad to help out!
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1 more answer , 3 more comments
Check the grounds at the rear of the engine/transaxle.
thanks I,ll do that
Did it shift before u fixed intake problem?
yea it was fine