Torque Converter Clutch Pressure Control Solenoid Circuit Low
The P2764 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the control circuit of the Torque Converter Clutch (TCC) pressure control solenoid. This solenoid regulates hydraulic pressure to engage and disengage the torque converter clutch, improving fuel economy and reducing transmission heat. A low circuit voltage can be caused by a faulty solenoid, damaged wiring, poor electrical connections, or a malfunctioning PCM. This issue can lead to improper TCC operation, resulting in transmission slippage, poor fuel economy, and potential transmission damage if not addressed.
01. Most Common Causes
- Faulty TCC pressure control solenoid
- Open or shorted wiring in the solenoid circuit
- Poor electrical connection (corroded or loose connectors)
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission slippage or shudder during torque converter lockup
- Poor fuel economy
- Transmission overheating
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the TCC solenoid resistance with a multimeter (compare to manufacturer specs).
Step 4: Check for voltage and ground at the solenoid connector with the key on.
Step 5: If wiring and solenoid are good, test the PCM output or replace the PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can cause transmission slippage, overheating, and potential internal damage. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor. The solenoid itself costs $50-$150, and labor adds $100-$250 depending on the vehicle.