P0749: Pressure Control Solenoid A Intermittent
What to do
Note whether the problem is worse cold or worse hot, and whether it is worse in traffic than on a long run. Those observations narrow this fault considerably, and they are things only you can report.
What this code means
The pressure control circuit is misbehaving intermittently rather than consistently. Shift quality varies journey to journey, or changes as the transmission warms, with no pattern the driver can pin down.
Temperature is the pattern worth testing for. Fluid thins substantially as it heats, so leakage past a worn valve bore rises with temperature — a transmission that shifts acceptably cold and slips once thoroughly warm is describing a hydraulic leak rather than an electrical fault. A solenoid whose winding insulation is failing behaves the opposite way round often enough that the distinction is diagnostic rather than academic.
Likely causes
Start here
- Faulty pressure control solenoid · moderate
- Worn valve body · specialist
- Damaged transmission wiring harness · moderate
Less common
- Low or degraded transmission fluid · easy
- Corroded transmission connector · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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