P2770
Torque Converter Clutch Circuit High
Transmission
Generic OBD-II
Medium
What it means
P2770 means the control module has detected high voltage — usually an open or a short to voltage — in the torque-converter clutch (TCC) circuit. The TCC locks the converter at cruising speeds, so a fault can cause shudder, slipping lockup, and sometimes the engine stalling as you slow to a stop. The engine still starts and runs.
Medium
Can I keep driving? Drivable, but you may notice shudder or the engine stalling as you slow to a stop if the converter clutch stays engaged. Diagnose soon.
Common symptoms
What you'll notice
- Check-engine light on
- Torque-converter shudder near lockup
- Engine stalling when slowing to a stop
- Slipping lockup or reduced fuel economy
Common causes
Most likely first
- Faulty torque-converter clutch solenoidLikely
- Open or high-voltage fault in the TCC circuitCommon
- Dirty or low transmission fluidCommon
- Corroded or loose connector at the transmissionLess often
- Faulty PCM/TCMLess often
How to diagnose & fix
Work through it in order
- Check transmission fluid level and condition.
- Inspect the TCC circuit wiring and connector for an open or a short to voltage.
- Test the TCC solenoid resistance.
- Scan for related TCC codes (P0741–P0744, P2769).
- Replace the solenoid or repair wiring. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2770?+
Often yes, but a stuck-on converter clutch can stall the engine at stops, which is unsafe in traffic. Repair it promptly.
Can I just clear P2770?+
It returns until the circuit fault is fixed. Address the solenoid or wiring first.
Related codes
Often seen with P2770
Read & clear P2770 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX