P2768 - Input/Turbine Speed Sensor Circuit Intermittent
The P2768 code indicates an intermittent signal from the input/turbine speed sensor, which monitors the rotational speed of the transmission's input shaft (turbine). This sensor is critical for proper transmission shift timing and torque converter lockup. An intermittent circuit can cause erratic shifting, harsh engagement, or limp mode. Common causes include wiring damage, loose connectors, sensor failure, or low transmission fluid.
01. Most Common Causes
- Faulty input/turbine speed sensor
- Damaged or corroded wiring/connectors
- Low or contaminated transmission fluid
- Internal transmission mechanical issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Erratic or harsh shifting
- Transmission stuck in limp mode
- Poor acceleration or hesitation
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect transmission fluid level and condition.
Step 3: Visually check sensor wiring and connector for damage or corrosion.
Step 4: Test sensor resistance and voltage with a multimeter per manufacturer specs.
Step 5: If sensor and wiring are good, check for internal transmission issues.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the transmission may shift erratically or enter limp mode, potentially causing further damage.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for sensor replacement, but can be higher if wiring repairs or transmission service is needed.