The P2758: Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On code indicates that the torque converter clutch (TCC) pressure control solenoid is stuck in the “on” position, which means it is always engaged. This can be caused by a faulty solenoid, problems with the control module, or issues with the wiring or connectors. When the TCC solenoid is stuck on, it can lead to drivability issues, such as harsh shifting or stalling, particularly at low speeds.
P2758 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2758: Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On |
| Is it serious? | Yes, a stuck “on” TCC solenoid can cause the torque converter to remain engaged at inappropriate times, leading to harsh shifts, engine stalling, and increased wear on the transmission. |
| Possible causes | – Torque converter clutch pressure control solenoid stuck in the on position – Faulty solenoid or control module – Wiring or connector issues |
| How to diagnose? | – Test torque converter clutch pressure control solenoid operation – Inspect wiring and connectors – Verify control module functionality – Replace faulty solenoid or components as needed |
P2758 Meaning
The P2758: Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On code means that the TCC pressure control solenoid is not disengaging as it should, staying in the “on” position continuously. The TCC solenoid’s job is to manage the engagement and disengagement of the torque converter clutch, which locks up to improve fuel efficiency at higher speeds. If stuck on, the clutch will remain engaged, which can lead to rough idling, stalling at stops, and damaging pressure on the transmission.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to determine if there are any other related codes present. Additional codes may help provide context about what else may be contributing to the solenoid being stuck on. | OBD-II Scanner |
| Test Torque Converter Clutch Pressure Control Solenoid Operation | Use a multimeter or diagnostic tool to test the functionality of the TCC pressure control solenoid. Check if it is engaging and disengaging as commanded by the control module and measure its resistance. Compare it to manufacturer specifications. | Multimeter, Diagnostic Tool, Manufacturer Specifications |
| Inspect Wiring and Connectors | Perform a visual inspection of all wiring and connectors linked to the TCC solenoid. Look for any loose connections, corrosion, damaged wires, or short circuits that could keep the solenoid stuck on. | Flashlight, Safety Gloves |
| Check for Shorts or Sticking Solenoid | Inspect the solenoid for internal mechanical sticking. Using diagnostic tools, verify if the solenoid is getting stuck in the “on” position due to debris, contamination, or wear. | Multimeter, Diagnostic Tool |
| Verify Control Module Functionality | Use a diagnostic tool to ensure that the transmission control module is properly controlling the solenoid. Faulty control module programming or output can also result in the solenoid being stuck in the “on” position. | Diagnostic Tool, Manufacturer Software |
| Replace Faulty Solenoid or Components as Needed | If the solenoid, wiring, or connectors are determined to be faulty, replace the defective components. If the control module is malfunctioning, repair or replace it as needed. | Replacement Solenoid, Wiring Repair Kit |
| Clear the Code and Test Drive | Once the repairs are completed, use an OBD-II scanner to clear the P2758 code. Conduct a test drive to ensure the TCC solenoid engages and disengages as it should, and verify smooth operation of the transmission. | OBD-II Scanner |
| Recheck for Codes | Perform a final scan after the test drive to confirm that the P2758 code has not returned. If the code reappears, further diagnostics are required to identify and resolve the underlying issue. | OBD-II Scanner |
Free PDF: How to choose OBD2 scanner
I’ve made you a free PDF to choose the OBD2 scanner in 5 minutes.
✅ Which OBD2 scanner is best?
✅ Which type should you get (DIY, Pro, Hobby)
✅ What is the best scanner for the exact brand/feature (e.g best for BMW)
✅ How to get a Bi-Directional tool for as cheap as $40
✅ Discount coupons for scanners
PDF is 100% free and it is designed to help you pick a scanner in less than a few minutes! Not a boring 50-page guide.
Just tell me where to send it.
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)