What P2764 means
Voltage on the TCC pressure control solenoid control line is below the expected window.
How the engine computer detects it
Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Written from public technical sources and not yet checked by a mechanic. How we write these pages
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
- Control wire shorted to ground Most likely
- Internal short in solenoid coil Possible
- Connector pins corroded - high contact resistance Less likely
How to diagnose P2764
- Read every stored code with an OBD-II scanner. If misfire or fuel trim codes are there too, fix those first: they often cause this one.
- Inspect the parts involved: tcc pressure solenoid, wiring harness.
- Work through the causes above from most to least likely, cheapest checks first.
- Clear the code and drive a full drive cycle to confirm the repair held.
Vehicles that report P2764 most
| Vehicle | Years | Reports | Share | Median miles |
|---|---|---|---|---|
| Subaru Impreza | 2012–2013 | 5 | 124k | |
| Subaru Outback | 2011–2012 | 4 | 120k | |
| Subaru Forester | 2014–2016 | 3 | — |
Counts of owner complaints to the NHTSA that mention P2764 (13 in total), not failure rates: popular models get more complaints simply because more of them are on the road. Models with fewer than 3 complaints are left out.
Reading the code
- P
- Powertrain
- 2
- Generic (SAE) code
- 764
- Specific fault
Questions drivers ask
Can I drive with code P2764?
If the car shifts normally, drive gently to a shop. If it's stuck in one gear, slips, shifts harshly or won't move out of Park, don't drive it: have it towed.
Often reported together
Codes that owners mention in the same NHTSA complaints as P2764. They can point to a shared cause, so it's worth checking them together.
This page is general information, not a substitute for a professional diagnosis. Repair costs are rough estimates for parts and labor and vary by vehicle and region.