P2744
Transmission Fluid Temperature Sensor B Circuit Intermittent
Automatic transmission (sensor)
Generic OBD-II
Low
What it means
P2744 means the transmission fluid temperature sensor 'B' signal is dropping out or reading erratically. The control module uses fluid temperature to tune shift and torque-converter strategy, so an intermittent fault can occasionally alter shift feel — but it's a sensor-signal issue, not something that stops the engine or transmission from working.
Low
Can I keep driving? Drivable. Shift quality may occasionally feel off, but the engine and transmission still work; get the intermittent fault traced.
Common symptoms
What you'll notice
- Check-engine light on (may come and go)
- Occasional harsh or altered shift timing
- Erratic transmission temperature readings
- Often no symptom between intermittent events
Common causes
Most likely first
- Loose, corroded, or intermittent connector at the transmission fluid temperature sensor 'B'Likely
- Chafed or intermittently open/shorted wiring in the sensor circuitCommon
- Faulty transmission fluid temperature sensor 'B'Common
- Poor ground or internal control-module fault (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the sensor connector and wiring, wiggle-testing for intermittent contact.
- Check for chafed harness sections and secure or repair any loose connectors.
- Measure sensor resistance across temperature and compare with spec.
- Replace the sensor if it reads erratically, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2744?+
Yes, generally. This is a temperature-sensor signal fault, so the main effect is occasional shift-quality changes rather than a breakdown.
Can I just clear P2744?+
You can, but an intermittent fault will likely reappear until the loose connection or sensor is fixed.
Related codes
Often seen with P2744
Read & clear P2744 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX