Powertrain
Definition only
Lights the check engine lamp
P2740: Transmission Fluid Temperature Sensor B Circuit
Standardized SAE J2012 code · P27xx — Transmission
What does P2740 mean?
The second transmission fluid temperature sensor returns no usable signal.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
- High Open sensor element or broken sensor wire
- Medium Corroded sensor connector
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2740 on the same make and model first.
P2740 in the community
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