Torque Converter Clutch Pressure Control Solenoid Circuit Electrical
The P2759 code indicates an electrical fault in the torque converter clutch (TCC) pressure control solenoid circuit. This solenoid regulates hydraulic pressure to engage the torque converter clutch, improving fuel economy by locking the converter. An electrical issue—such as an open or short circuit, high resistance, or faulty solenoid—can prevent proper clutch engagement, leading to transmission slippage, overheating, and reduced efficiency.
01. Most Common Causes
- Faulty TCC pressure control solenoid
- Open or shorted wiring in the solenoid circuit
- Poor electrical connection at the solenoid or PCM
- Damaged transmission control module (TCM/PCM)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Torque converter shudder or vibration during lockup
- Poor fuel economy
- Transmission overheating
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect wiring and connectors for damage, corrosion, or loose pins.
Step 3: Test solenoid resistance with a multimeter (specs vary by vehicle).
Step 4: Check power and ground at the solenoid connector with key on.
Step 5: Perform a solenoid actuation test using a scan tool.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a faulty TCC solenoid can cause transmission slippage, overheating, and potential internal damage. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts (solenoid $50-$150) and labor. If the transmission control module needs replacement, costs can exceed $800.