P light blinks after solenoids replacement (AL4 gearbox)

[GianniPie]

Hi everyone!
I'm Gianni from Italy.
I have a 206cc with automatic gearbox with the well known problem of gearbox that stucks in 3rd gear and sport and snow blinking.
I replaced the 2 solenoids in the hydraulic block, I drained and replaced the oil (4.5 l) but now it's not working at all. The P light on dashboard blinks and i can't move the gear lever from P position.
If I manually free the lever, the LEDs don't follow the gear lever position.
Any idea?
Thanks in advance

[IanL]

If the replaced solenoids are the high frequency type (2574.16), and the originals the low frequency type (2574.10), the transmission ECU needs a software update which is a dealer or transmission specialist procedure. That could be the problem.

[GianniPie]

Thanks IanL for your answer.
Unfortunately I don't have any information about the code you are talking about.. the site where I bought them displays both numbers for the same item.

Anyway, I reverted the operation and now the car is working (bad) as before.

[IanL]

As the reversion was successful, it is almost certain that you were sold the new high frequency solenoids. You would need to find a Peugeot dealer or an AT specialist who could apply the new software to the transmission ECU.