Symptoms of Toyota automatic transmission sensor malfunction:
General symptoms:
* Gear slippage
*Hard shifting
* Delay when shifting gears
* Vibration when shifting gears
*Transmission fluid leak
Specific symptoms of malfunction of individual sensors:
Input shaft speed sensor:
*Speedometer may show incorrect speed
* Automatic transmission can switch to neutral when driving
Output shaft speed sensor:
*Speedometer may show incorrect speed
* Automatic transmission may not shift to higher gears
Throttle position sensor:
* Rough idle
* Poor response when accelerating
Gear selector position sensor:
* Automatic transmission may not shift to the selected gear
* Incorrect gear indicators may appear on the instrument panel
Engine speed sensor:
* Unstable idle
* Rough gear shifting
Transmission fluid temperature sensor:
* The automatic transmission may go into emergency mode if the transmission fluid overheats
Transmission fluid pressure sensor:
* Low transmission fluid pressure warning light comes on
* Automatic transmission may refuse to shift into gears
Causes of malfunction of Toyota automatic transmission sensors:
*Normal wear and tear
* Damage to wiring
*Corrosion
* Malfunction of the automatic transmission ECU
Diagnosis and troubleshooting:
* Reading fault codes using a scanner
* Checking wiring and connectors
* Replacement of faulty sensors
* In severe cases, it may be necessary to replace the automatic transmission ECU