P2766Transmission
Input/Turbine Speed Sensor B Circuit Range/Performance
P2766 means the input or turbine speed sensor B is reading out of range or implausibly, so input shaft speed data is unreliable.
🚗 Not recommended for long. Erratic turbine speed data causes harsh shifts.
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🎯 Top Causes, Ranked by Likelihood
#1Faulty turbine speed sensor B$100-$350
The sensor reads erratically or out of range.
#2Tone ring damage$300-$1000
A damaged tone ring skews the signal.
#3Wiring or connector issue$100-$350
High resistance or intermittent wiring.
#4TCM fault$500-$1200
The reading circuit has failed.
🩺 Common Symptoms
- Harsh or erratic shifts
- Check engine light
- Possible limp mode
- Shift timing problems
- Perceived slipping
💰 Repair Cost: DIY vs Shop
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🔧 How to Diagnose P2766
1Scan live data and compare to output speed
2Inspect the sensor wiring and connector
3Test the sensor signal with a scope
4Inspect the tone ring for damage
❓ Frequently Asked Questions
Can I drive with P2766?
Only briefly. Unreliable turbine speed data causes harsh shifts and possible limp mode.
What does range performance mean?
The sensor signal is present but implausible compared to expected values.
How much to fix P2766?
Sensor replacement usually runs $150-$600 including labor.
🔗 Related Codes
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