Possible reasons why the car stalls when switching the automatic transmission selector:
*Low Transmission Fluid Level: Insufficient fluid results in insufficient lubrication and cooling of transmission components, which can cause the clutch to slip and stall the engine.
* Contaminated Transmission Fluid: Over time, transmission fluid becomes contaminated with friction material particles and metal shavings. This reduces its lubricating properties and may interfere with normal clutch operation.
* Worn or faulty clutches: Over time, transmission clutches wear out or fail, causing the engine to slip and stall.
* Malfunctioning Solenoids: Transmission solenoids control the flow of transmission fluid. If they are faulty, it can result in delayed or incorrect shifts, which can cause the engine to stall.
* Malfunctioning transmission control unit (TCM): The TCU is an electronic component that controls the operation of the transmission. If the trailer hitch is faulty, it can cause the transmission to malfunction and stall the engine.
* Faulty sensors: Transmission sensors provide the hitch with information about engine speed, vehicle speed and other parameters. Faulty sensors can send incorrect signals, causing the transmission to malfunction and the engine to stall.
*Wiring Problems: Damaged or loose wires can disrupt electrical signals between the various components of the transmission, which can cause the engine to malfunction and stall.
What to do:
* Check the level and condition of the transmission fluid.
*If the fluid is dirty or low, take it to a mechanic to have the fluid and filter replaced.
*Check for trouble codes using the OBD-II diagnostic scanner.
*If automatic transmission related codes are detected, have the problem diagnosed and repaired by a mechanic.
* If the traffic light combination is faulty, have a mechanic replace the faulty bulbs or fix other wiring problems.