Hi All, I have not long aquired a 1.6 C4 Picasso VTR+ with the 6 speed Auto / Manual gearbox, i dont know if its just me, but find when pulling away in 1st gear auto / man mode there is a very slight delay before the drive engages which causes a slight thud, also if i give a bit more rev to pull away, there is a slight judder, question is, is it me not used to this type of gearbox, or is there Find & Solve Common Car Problems; Air Filter Change; Auxiliary Belt Replacement; Citroen C4 Picasso. 2007 - 2014 . Identifying fault codes. Time. 10 minutes. This is a common problem on older 4HP14/18 and is caused by 'varnish' and debris on the governor. USually as the fluid warms up they free off. An automated-manual gearbox does not have a governor because all of the control data (road speed, rpm etc) is electronically sensed and the shifting of the transmission is carried out by external actuators.

A burning smell in a car is never a good sign, so when it comes to the gearbox, a burning smell can be the result of transmission fluid overheating. If the fluid system fails, then other parts of the system will suffer as a result. Transmission fluid acts as lubricant and a cooling agent for the moving parts of a transmission. As they are in

Answered by Graham Smith · 9 June 2016. You'll have trouble selling it without getting the transmission fixed, so I would recommend that you take it to a transmission specialist and at least get it assessed and quoted so you know what you're up for. I doubt that the trade would be interested in it, unless you could perhaps convince a Citroen
P1718. Description of Fault: Gear selector signal fault (Lever) : Coherence. Signal from the gear selector sensor incoherent (one or more of the switches on the selector faulty). Conditions for Fault to clear: No faults for 2 seconds. Downgrade Modes whilst Fault is active: If the vehicle is moving in forward gear, automatic mode is activated
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citroen c4 grand picasso semi automatic gearbox problems