Emergency modes of automatic transmission due to temperature sensor
The transmission temperature sensor provides transmission fluid temperature information to the transmission control module (TCM). If the sensor is faulty or is reporting incorrect readings, the TCM may put the transmission into limp mode.
General emergency modes caused by a faulty automatic transmission temperature sensor:
* Limp mode: The automatic transmission remains in one or more gears, usually 3rd or 4th.
* Stuck Gear: The automatic transmission may get stuck in one gear and not shift to others.
* Incorrect shifting: The automatic transmission may have trouble shifting gears or shift into the wrong gear.
* Shift lag: Automatic transmissions may experience delays when shifting gears, especially under heavy load conditions.
Consequences of automatic transmission emergency mode:
* Deterioration in vehicle performance
*Decreased fuel efficiency
*Damage to other transmission components
Diagnosis and elimination
Diagnosis of an emergency mode caused by an automatic transmission temperature sensor usually includes the following steps:
* Scan Trouble Codes: The OBD-II scanner can detect trouble codes related to the temperature sensor or transmission fluid temperature.
*Checking the Temperature Sensor: The temperature sensor can be checked for proper operation using a multimeter.
* Replacement of temperature sensor: If the sensor is faulty, it must be replaced.
Prevention
To prevent automatic transmission emergency modes due to the temperature sensor, it is important:
* Regularly service the automatic transmission, including replacing the transmission fluid and filter.
* Avoid overloading and slipping of the vehicle.
* Promptly repair any mechanical problems that may affect the transmission fluid temperature.