P2765Transmission

Input/Turbine Speed Sensor B Circuit

P2765 means the transmission control module detected a fault in the input or turbine speed sensor B circuit, so it may not read input shaft speed correctly.

🚗 Not recommended for long. Loss of turbine speed data causes harsh shifts and limp mode.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty input/turbine speed sensor B$100-$350

40%

The sensor has failed or reads erratically.

#2Wiring or connector fault$100-$350

30%

Open, shorted, or corroded wiring disrupts the signal.

#3Reluctor or tone ring damage$300-$1000

15%

A damaged tone ring corrupts the speed signal.

#4TCM fault$500-$1200

15%

The reading circuit has failed.

🩺 Common Symptoms

Harsh or erratic shifts
Check engine light
Possible limp mode
Speedometer or shift timing issues
Slipping perception

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$400

Shop Cost

$150-$700

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2765

1Scan live data for input speed readings

2Inspect the sensor wiring and connector

3Test the sensor output with a scope or meter

4Inspect the tone ring for damage

❓ Frequently Asked Questions

Can I drive with P2765?

Only briefly. Without accurate turbine speed the transmission may shift harshly or enter limp mode.

What does turbine speed sensor B measure?

It measures the transmission input or turbine shaft speed used to control shifts.

How much to fix P2765?

Sensor replacement usually runs $150-$600 including labor.

🔗 Related Codes

P2766P2767P0716P0717