Possible reasons:
1. Low transmission fluid level:
* Check the fluid level and add if necessary.
2. Contaminated transmission fluid:
* Replace fluid and filter according to manufacturer’s recommendations.
3. Problems with the transmission position sensor:
* The sensor may not correctly transmit shift position information to the Engine Control Module (ECM), causing the engine to shut down.
4. Problems with ECM:
* The ECM may not be receiving correct signals from transmission sensors or processing them properly.
5. Problems with wiring or connections:
* Broken, damaged or loose wires or connections can interfere with signals to and from the transmission.
6. Malfunction of transmission solenoids:
* Solenoids control the flow of fluid in the transmission and can fail, causing shifting problems.
7. Problems with the torque converter:
*A faulty torque converter can cause loss of power and shifting problems.
8. Mechanical problems in the gearbox:
* Worn or damaged components in the transmission can cause shifting problems and cause the engine to shut down.
9. Vacuum leak:
* Vacuum leaks to transmission components or the ECM may affect shifting.
Diagnostics and repair:
It is recommended that you contact a qualified mechanic to accurately diagnose the problem. They can:
* Check the level and condition of the transmission fluid.
* Conduct computer diagnostics to search for fault codes.
* Physically inspect and test sensors, wiring and transmission components.
* Carry out the necessary repairs to eliminate the problem.