P2770: Torque Converter Clutch Circuit High

P2770 flags a high level on the torque converter clutch circuit, meaning a short to the battery supply on the TCC solenoid or its wiring. Ford documents it in the 2024 OBD summary for the 6R80, 6R140, 10R60/10R80 and the 8F front-drive families: P2770 corresponds to UDS P0740_12, while P0740_13 covers an open line and P2769 (P0740_11) a short to ground. One table even shows P0744, the older code for the same short to power, beside P2770 under the same failure byte. The electrical check runs at all times; the stated monitoring duration for an electrical fault is 5 seconds. The TCM then keeps the converter unlocked, so cruising rpm and fluid temperature rise and fuel use worsens. A harness rubbing against a powered wire or a damaged case connector are the usual finds.

Symptoms

• MIL on
• No converter lockup, higher rpm at highway speed
• Higher fuel consumption and fluid temperature

Most likely causes

• TCC circuit chafed against a powered wire
• Damaged or contaminated transmission case connector
• Internal short in the TCC solenoid
• Faulty TCC output driver in the TCM/PCM

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the fluid level and condition
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Read the input and output speed in live data
4. Check the connector and wiring
5. Check for other related engine codes
6. Consult the manufacturer's procedure for the transmission

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P2770 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 7: Transmission
• 70: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2770?

Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.

What causes code P2770?

The most common causes are: tCC circuit chafed against a powered wire; damaged or contaminated transmission case connector; internal short in the TCC solenoid.

Related codes

• P2769Torque Converter Clutch Circuit Low
• P0740Torque Converter Clutch Circuit/Open
• P0744Torque Converter Clutch Circuit Intermittent
• P0741Torque Converter Clutch Circuit Performance/Stuck Off
• P2758Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On

Sources

• fordservicecontent.com: OBDSM2400OUTPUT 16Jul2024 WSM final V2 MCS7001
• law.cornell.edu: 13 CCR 1968.2

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.