P2770Transmission
Torque Converter Clutch Circuit High
P2770 means the torque converter clutch solenoid circuit voltage is higher than expected, often from an open circuit.
🚗 Not recommended for long. A high TCC circuit disrupts converter lockup.
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🎯 Top Causes, Ranked by Likelihood
#1Open in wiring$100-$350
A break leaves the circuit voltage high.
#2Failed TCC solenoid$150-$500
An open solenoid reads high.
#3Corroded connector$80-$250
Corrosion opens the circuit.
#4TCM driver fault$500-$1200
The module output has failed high.
🩺 Common Symptoms
- No or poor lockup
- Poor fuel economy
- Check engine light
- Higher rpm at cruise
- Possible limp mode
💰 Repair Cost: DIY vs Shop
📋 Free OBD2 Code Cheat Sheet
The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.
🔧 How to Diagnose P2770
1Check fluid level and condition first
2Inspect wiring for opens
3Test the solenoid continuity
4Verify circuit voltage with a scan tool
❓ Frequently Asked Questions
Can I drive with P2770?
Only briefly. Loss of lockup hurts economy and generates heat.
What does circuit high mean?
Voltage is higher than expected, usually from an open circuit.
How much to fix P2770?
Wiring fixes may be under $300; a solenoid runs $300-$800.
🔗 Related Codes
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