One day later the car won't shift out of 1st gear again. Bad installation of solenoid,loose wire connection, incompetent mechanics? Transmission shifted like new for that 1 day. Shop notified and told to bring car back for diagnosis.
Local shop replaced shift control solenoid due to car not shifting out of 1st. on 2004 Dodge Neon
out put side of speed censer if speed odometer don't work all so
get them to trace the wiring harness, sometimes the tranny is on the same circuit as other accessories such as the a/c, etc..and that may be causing the issue.
And the transmission codes were/are what?? Get the results of the scan test so we can help.