P2740
WysokiTransmission Fluid Temperature Sensor 'B' Circuit Malfunction. The control module (PCM) detected an incorrect signal from the TFT B sensor.
OBD-II (EN): Transmission Fluid Temperature Sensor B Circuit Malfunction
Code P2740 means the vehicle's control module detected an incorrect signal from the transmission fluid temperature sensor 'B'. This can cause incorrect gear shifts, limp mode, or the risk of transmission overheating. Prompt diagnosis by a specialist is recommended to avoid serious transmission damage.
Symptoms
Check Engine Light on Incorrect torque converter clutch operation Harsh or delayed gear shifts Vehicle stuck in limp mode Possible transmission overheating
Possible causes
Faulty transmission fluid temperature sensor 'B' Open or shorted wire in the TFT B sensor circuit Corrosion or damage to the sensor electrical connector Low or contaminated transmission fluid Faulty PCM/TCM control module (rare)
Affected systems
Does code P2740 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.