The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.Google+
Car Problem Reports
Buick Century Transmission Pressure Control Solenoid Failure May Cause Erratic Shifting
Buick Century Problem
Average Mileage: 117,392 mi (25,926 mi - 155,000 mi)
Visitor, 2001 Buick Century, 145,000 mi
transmission sometimesshfts hard
Visitor, 2002 Buick Century
Car won't shift acts like it has no power and gets really bad gas
Visitor, 2000 Buick Century, 115,000 mi
Same problem as others are having. Around 70,000 miles on a trip it started to shift hard and whine. I took it to a garage and $830.00 later they said the solenoid was bad. Not even 3,000 miles later it started the same thing again. I refuse to pay another $800 plus dollars to fix a problem that GM should have fixed right the first time. I plan on not to purchase any other Buicks nor will my family members.
My transmission shifts hard. When I took it to the mechanic, they told me it would be $2500 or more to take it apart and fix it... I figured I might as well pay for a used transmission that would be cheaper and swap it out...
Visitor, 2000 Buick Century
Bought it w/ 88k mi. now @ 110k, have had regular oil changes @ 3k intervals and have read elsewhere of the same problem. There's a hitch in her giddyup, lots of lurching when it's trying to shift and then the check engine light comes on, then goes off and it runs fine. Recently had the codes read: PO742 TCC CKT stuck on and PO481 Cooling Fan 2 Ctrl CKT Malfunction. AAAAARRRRGGGHHH. Should this have been recalled along time ago ... .
I have a 2001 Buick Park Avenue Ultra with 115,000 miles and for the last 5,000 miles the transmission has been shifting roughly intermittently. Sometimes it is fine and sometimes the shifting is rough. Last week I drove it about 40 miles to a golf course and in the stop and go traffic the shifting was rough. After playing golf for 5 hours I drove back the same way and there were no problems and the shifting was smooth. I had the transmission serviced at 107,000 miles and after that is when the shifting problems began. I had the transmission serviced again at 110,000 and this helped until now at 115,000 miles. Reading all the reports, it seems that the power control solenoid PCS needs to be replaced.
Visitor, 2000 Buick Century, 120,000 mi
hard shifting after driving long on long trips,after key is turned off and back on it shifts normal.
Visitor, 2002 Buick Century, 150,000 mi
same problem as everyone else shift solenoid gone bad. if you turn car off for a few minutes and restart problem will go away for a little while but will come back.my car has had this problem for over a year at about 150,000 or so i now have over 205,000 on it and still running fine. just that nuisance clinking ever so often but nothing I am going to pay 2500 to fix. car is 9 yrs old that 2500 when I do decide to spend it is going on a new car not in this on besides it only happens very seldom so I can live with it.
Visitor, 2000 Buick Century, 155,000 mi
I have the erratic shifting but have not had the problem fixed yet.
Visitor, 2000 Buick Century, 25,926 mi
Had the solenoid replaced at a cost of $800. Within a few months the problem with the erratic shifting started again. Took the car back to the repair place (Christian Brothers) said the diagnostic code was different and said that the car needed a valve body replacement. Had this repair at A+ Transmission at a cost of $1075. Now a year later, but with less than 30,000 miles on the car, the car is shifting roughly again, and a diagnostic check said the torque converter switch is stuck to "on". Planning to take it to another transmission shop for a second opinion. This apparently is a habitual problem from other reports I've read.