To all you reno owners out there with an AL4/dpo,these units suffer from solinoid valve problems ,along with people putting in the wrong fluid Only use FULLY SYNTHETIC
Because they suffer from cooling problems ,the hand book refers to
Spending to long in traffic /to long on the motorway /pulling to heavy loads,they go on to sat that you should put a themostat in that has a lower value,all of this points to overheating the fluid the condition sensor then flags it up to the computer,
If you replace the 2 regulator valves with the Borg warner ones you will have to upgrade the software otherwise your back to square 1
Renault will tell you the fluid will last the life time of the car with a top up now and again ,every other mfg will tell you to change the fluid every 30,000 m .
Some Renault transmission's do not have a drain plug they only have a level plug ,if you do not change the fluid you will be pumping
Debris from the friction material from the clutches and steels around the system this can damage valve body components o rings,bearings,bushings,solinoids