Causes of the error “Incorrect automatic transmission gear ratio”:
* Malfunction of Input Shaft Speed Sensor (VSS): It measures the rotational speed of the transmission input shaft and sends data to the Transmission Control Module (TCM). A faulty VSS can result in inaccurate speed readings and gear ratio errors.
* Malfunction of Output Shaft Speed Sensor (OSS): It measures the rotational speed of the transmission output shaft and transmits the data to the TCM. A faulty OSS can also lead to inaccurate speed readings and gear ratio errors.
* Faulty Shift Solenoids: These solenoids control the shifting of gears in the transmission. A faulty solenoid can cause slippage or harsh shifting, which can cause gear ratio errors.
* Mechanical failure in the transmission: Worn gears, bearings or other mechanical components can affect the transmission ratio and cause errors.
* Torque Converter Malfunction: The torque converter transmits torque from the engine to the transmission. A faulty torque converter can cause slippage, resulting in gear ratio errors.
* Incorrect TCM software: Errors or glitches in the TCM software can affect transmission control and cause gear ratio errors.
* Electrical Problems: Opens or shorts in the transmission harness can interfere with the transmission of signals between the TCM and transmission sensors, causing gear ratio errors.
Consequences of the error “Incorrect automatic transmission gear ratio”:
*Reduced transmission performance
*Slipping or harsh gear changes
*Poor fuel economy
* Increased emissions
* Damage to the transmission if the problem is not corrected in time