What Does P2744 Mean?
The transmission control module is detecting an intermittent or erratic signal from transmission fluid temperature sensor B circuit. This indicates a loose connection, damaged wiring, or failing sensor that works sporadically.
Common Causes
40%
Loose, corroded, or intermittent connection at sensor connector
30%
Damaged wiring harness with intermittent open or short circuits
20%
Failing transmission fluid temperature sensor B with intermittent internal fault
10%
Moisture intrusion in connector or wiring causing intermittent short
Diagnostic Steps
1
Step 1: Wiggle test sensor connector and wiring harness while monitoring live data for signal dropouts
2
Step 2: Thoroughly inspect sensor connector for bent pins, corrosion, or moisture; clean and apply dielectric grease
3
Step 3: Check wiring harness routing for chafing points, especially near moving components or hot exhaust
4
Step 4: Monitor sensor data during test drive over rough roads to reproduce intermittent condition
5
Step 5: If intermittent fault cannot be isolated to wiring, replace sensor as it is likely failing internally
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The transmission control module is detecting an intermittent or erratic signal from transmission fluid temperature sensor B circuit. This indicates a loose connection, damaged wiring, or failing sensor that works sporadically.
The most common cause of P2744 (Transmission Fluid Temperature Sensor "B" Circuit Intermittent) is: Loose, corroded, or intermittent connection at sensor connector
Typical repair costs for P2744 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent shifting problems may occur unpredictably. Transmission may suddenly enter limp mode during operation, potentially creating hazardous situations in traffic.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2744 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
