The P0749: Pressure Control Solenoid A Intermittent refers to an intermittent malfunction in pressure control solenoid “A,” which can cause irregular transmission fluid pressure regulation. This may lead to erratic shifting and performance issues. The problem is often related to a faulty solenoid, wiring issues, or poor connections.
P0749 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0749: Pressure Control Solenoid A Intermittent |
| Is it serious? | Yes, intermittent issues can lead to unpredictable shifting and potential transmission damage. |
| Possible causes | – Intermittent issues with pressure control solenoid A – Faulty solenoid – Wiring or connection issues |
| How to diagnose? | – Test solenoid A for intermittent faults – Inspect wiring and connectors – Replace faulty solenoid if necessary |
P0749 Meaning
The P0749 code indicates that the transmission control module (TCM) is detecting intermittent functionality in pressure control solenoid “A.” This solenoid is responsible for regulating hydraulic pressure in the transmission, and intermittent issues can cause erratic shifting, poor vehicle performance, and potential transmission wear over time.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check if there are other transmission-related codes that could provide further clues about the issue. | OBD-II Scanner |
| Test Solenoid A for Intermittent Faults | Use a multimeter or diagnostic tool to check solenoid A for intermittent electrical faults. Monitor its performance under different conditions to detect irregularities. | Multimeter, Diagnostic Scanner |
| Inspect Wiring and Connectors | Inspect the wiring and connectors leading to solenoid A for damage, wear, loose connections, or corrosion that could cause intermittent issues. | Flashlight, Multimeter, Safety Gloves |
| Check Transmission Fluid | Ensure the transmission fluid level is correct and that the fluid is clean. Contaminated or low fluid can affect solenoid performance. | Transmission Fluid Tester, Dipstick |
| Replace Faulty Solenoid | If solenoid A is found to have intermittent issues, replace it with a new one according to manufacturer specifications. | Replacement Parts, Wrenches, Screwdrivers |
| Clear the Code and Test Drive | After completing repairs, clear the code with an OBD-II scanner and take the vehicle for a test drive to verify the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, rescan the vehicle to ensure that the P0749 code has not returned. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko