What Does P2768 Mean?
The input/turbine speed sensor B signal is cutting in and out intermittently. This indicates an unstable connection, failing sensor, or wiring issue causing sporadic signal loss during operation.
Common Causes
35%
Loose or corroded electrical connector at speed sensor
30%
Intermittently failing speed sensor with internal breakdown
25%
Damaged wiring harness with intermittent open or short
10%
Loose sensor mounting causing variable air gap
Diagnostic Steps
1
Step 1: Thoroughly inspect and clean sensor connector; check for backed-out terminals or corrosion
2
Step 2: Perform wiggle test on wiring harness while monitoring sensor signal on scan tool to recreate intermittent fault
3
Step 3: Check sensor mounting torque and ensure sensor is properly seated in transmission case
4
Step 4: Monitor sensor signal during test drive under various conditions (temperature, vibration, load)
5
Step 5: Use oscilloscope to capture sensor waveform and identify signal dropouts or noise interference
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
The input/turbine speed sensor B signal is cutting in and out intermittently. This indicates an unstable connection, failing sensor, or wiring issue causing sporadic signal loss during operation.
The most common cause of P2768 (Input/Turbine Speed Sensor "B" Circuit Intermittent) is: Loose or corroded electrical connector at speed sensor
Typical repair costs for P2768 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent signal loss may cause sudden unexpected shifting or temporary loss of gears. Could pose safety risk if transmission suddenly enters limp mode during acceleration or highway driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2768 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
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
