My 2000 S40 134k won’t shift into second gear. This is very intermittent, could go 3 months without doing it or it could happen twice in one week. Usually pulling over putting the car in park and turning the car off and on will clear it. Sometimes just driving in first for while keeping the revs down it will shift, then act normal. The other problem is , it will downshift into 3rd from 4 gear while cruising .This has happened 2 or 3 times in the last 5 years.
Bad solenoid or ECU issue?