Possible reasons:
Transmission problems:
* Worn or damaged clutch
*Low transmission fluid level
* Malfunction of gear position sensors
Engine problems:
* Fuel injection system malfunction
* Clogged fuel filter
* Faulty spark plugs or wires
* Air supply problems
Electrical problems:
* Malfunction of the engine control unit (ECU)
*Faulty throttle or crankshaft sensors
*Wiring fault
Vacuum problems:
* Vacuum leaks
* Faulty vacuum brake booster
Diagnostic process:
1. Check the transmission fluid level and condition.
2. Examine trouble codes using an OBD-II scanner.
3. Check the clutch by pressing the clutch pedal and turning the engine.
4. Check the fuel system, including the fuel filter and injectors.
5. Check spark plugs and wires for damage.
6. Check the air supply, making sure the air filter is clean and there are no air obstructions.
7. Check the electrical system, including the ECU and sensors.
8. Check the vacuum system for leaks.
Solution:
Depending on the identified cause, the solution may include:
* Clutch replacement or transmission repair
* Replacing or topping up transmission fluid
* Troubleshooting transmission sensors
* Repair or replacement of engine components
* Eliminate vacuum leaks
* Reprogramming or replacing the ECU