Common Citroen C4 automatic transmission problems:
Gear slippage:
*Lack of transmission fluid
* Worn clutches or steel discs
* Clogged valve body
Liquid leak:
* Leaks from drive shaft seals
* Oil pan gaskets
* Heat exchanger
Noises and vibrations:
* Worn bearings or bushings
* Faulty oil pump
* Problems with the hydraulic accumulator
Difficulty shifting gears:
* Malfunction of gear position sensors
* Malfunction of the electronic control unit (ECU)
* Problems with transmission solenoids
Other problems:
* Lack of response when shifting gears
* The gearbox goes into emergency mode
* Burnt oil smell
Possible causes of problems:
* Lack of service
*Operation with low fluid level
* Aggressive driving
* Electrical problems
*Mechanical faults
Diagnostics and repair:
* Checking fluid level and condition
* Scan the ECU to identify fault codes
* Physical inspection of the gearbox
* Disassembly and repair if necessary
It is important to understand that automatic transmission problems can be complex and expensive to repair. Therefore, it is important to maintain your vehicle regularly and seek help quickly if any problems arise.