Powertrain, generic (extended)

P2770 Torque Converter Clutch Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

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

Symptoms

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

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–1,200
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

tcc solenoidtcmtransmission wiring

Related codes

P2769P0740P0744P0741P2758

References: fordservicecontent.com, law.cornell.edu.