P2770
Torque Converter Clutch Solenoid Circuit High
The voltage on the TCC solenoid control circuit is above the calibrated maximum. Either the wire is shorted to battery voltage or the solenoid coil is open.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
Ordered by how often each turns out to be the cause.
- Control wire shorted to batteryCommon
- Open solenoid coilPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- TCC Solenoid
- TCM
- Transmission Wiring
P2770 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.