Possible causes of Citroen C4 gearbox jerking
Mechanical faults:
* Faulty transmission control unit (ECU)
*Damaged or worn transmission parts (gears, bearings, clutches)
*Lack or contamination of transmission fluid
* Torque converter clutch slipping
Electrical faults:
* Faulty solenoids in the gearbox
*Defective wiring harness
* Faulty speed or position sensors
Software faults:
* Outdated or damaged ECU software
Other possible reasons:
* Worn spark plugs or ignition coils
*Leaky air intake system
*Faulty throttle position sensor
Diagnosis and troubleshooting:
*Checking the transmission fluid level and condition: Make sure the fluid level is at the correct level and that it is not contaminated.
* Scan Trouble Codes: Connect a scanner to your vehicle to check for any trouble codes that may indicate a transmission problem.
* Visual Inspection: Inspect the transmission for leaks, cracks or other visible damage.
* Test drive: Drive the car and pay attention to the timing and nature of the twitching. This may give you an idea of the possible cause of the problem.
Replacing or repairing faulty components may solve the twitching problem. Depending on the reason for the repair, it may be necessary to replace or reprogram the ECU, replace solenoids, or repair/replace mechanical components.