Damaged or chafed wiring in the solenoid control circuit, often near the transmission connector or along the harness; Corroded, loose, or contaminated electrical connector at the torque converter clutch solenoid or transmission case pass-through; Faulty torque converter clutch pressure control solenoid with an internal short or open winding; Poor ground connection for the solenoid circuit or transmission case; Failed powertrain control module driver for the solenoid circuit, though rare; Transmission fluid contamination or debris blocking solenoid operation, indirectly causing a low circuit condition

DTC codes / P27xx · Transmission / P2764

P2764Torque Converter Clutch Pressure Control Solenoid Control Circuit Low

P2764 indicates that the powertrain control module has detected an abnormally low voltage or current on the control circuit for the torque converter clutch pressure control solenoid. This solenoid regulates hydraulic pressure to engage and disengage the torque converter clutch, and a low circuit condition prevents reliable clutch operation.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Harsh or delayed engagement of the torque converter clutch, felt as a shudder or jerk during light acceleration
Transmission may fail to enter lockup mode, causing higher engine RPM at highway speeds and reduced fuel economy
Intermittent or complete loss of torque converter clutch operation, leading to poor acceleration or stalling when coming to a stop
Transmission may default to a limp-home mode with firm or delayed shifts

Common causes, most likely first

Damaged or chafed wiring in the solenoid control circuit, often near the transmission connector or along the harness
Corroded, loose, or contaminated electrical connector at the torque converter clutch solenoid or transmission case pass-through
Faulty torque converter clutch pressure control solenoid with an internal short or open winding
Poor ground connection for the solenoid circuit or transmission case
Failed powertrain control module driver for the solenoid circuit, though rare
Transmission fluid contamination or debris blocking solenoid operation, indirectly causing a low circuit condition

How to diagnose and fix it

Scan all modules for stored and pending codes, and record freeze-frame data to confirm the fault conditions
Inspect the solenoid circuit wiring and connectors for damage, corrosion, or loose pins, and repair as needed
Measure resistance of the torque converter clutch pressure control solenoid and compare to manufacturer specifications
Check for short to ground or open circuit in the control wire between the powertrain control module and solenoid
Verify power and ground supplies to the solenoid circuit under load using a test light or multimeter
If electrical checks pass, replace the torque converter clutch pressure control solenoid and clear codes
After repair, clear adaptive learning and perform a road test to confirm proper torque converter clutch operation

What a low circuit code really means

A low circuit code can be set by a short to ground in the wiring, not just a failed solenoid, so always inspect the harness before replacing parts.
Contaminated transmission fluid can cause solenoid sticking that mimics an electrical fault, so check fluid condition and service history first.
Some vehicles set P2764 when the ignition is left on with the engine off for extended periods, causing a false low-voltage condition.
The torque converter clutch solenoid shares power or ground with other solenoids on many transmissions, so a fault in a shared circuit can trigger this code.
A failing powertrain control module driver is rare but possible; confirm all other possibilities before condemning the module.

Can I keep driving with P2764?

You can usually drive the vehicle with this code, but avoid heavy acceleration and highway speeds that demand torque converter clutch engagement. Prolonged driving may cause transmission overheating or further damage, so schedule diagnosis soon.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.