P2757🔧 Automatic transmission (torque converter lockup)Stop and fix promptly

P2757: Torque Converter Clutch Pressure Control Solenoid (Meaning, Causes, Fixes)

Reviewed 2026-10-23 · Based on 4 cited source(s)

What P2757 means

At cruising speed the torque converter clutch locks the engine directly to the transmission so nothing slips, which saves fuel and keeps the transmission cooler. A pressure control solenoid, run by the computer, sets the fluid pressure that applies that clutch. The computer checks that lockup is working by comparing engine speed with the transmission's input (turbine) speed. Toyota's Hilux service manual says P2757 sets when lockup doesn't happen during normal driving in the lockup range (about 50 mph), or stays on when it should be off, on two separate trips; in that manual's example, engine speed at least 70 rpm above turbine speed while lockup is commanded counts as a fault. The sources disagree on the name and on whether wiring matters. RepairPal titles the code "Torque Converter Clutch Pressure Control Solenoid Control Circuit" and lists a wiring issue as a cause. Toyota's C-HR manual names it "Control Circuit Performance or Stuck OFF", and Sonnax says the code points to a mechanical or hydraulic problem causing no lockup, not an electrical one. Sonnax notes P2757 is common on Toyota and Scion U340/U341 series transmissions that use a modulated (SLU) lockup solenoid. Details and specs vary by vehicle.

Severity: can I keep driving?

Stop and fix promptly

Get it checked soon. RepairPal rates P2757 as Urgent. The usual result is that the torque converter stops locking up at cruising speed, which raises fuel use and transmission heat, and a slipping lockup clutch can wear further if ignored. Check the fluid and avoid towing or hard driving until it is diagnosed. If the transmission slips, shudders badly or won't shift properly, have it looked at before driving far.

Common symptoms

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

  1. A faulty torque converter lockup (SLU) pressure control solenoid, stuck open or closed (RepairPal, Toyota service manual)
  2. A blocked valve body, or on Toyota/Scion U340/U341 units, wear in the lockup control valve bore and plunger sleeve that leaks apply pressure (Toyota service manual, Sonnax)
  3. A failed torque converter or torque converter clutch (RepairPal, Toyota service manual)
  4. Low line pressure or other internal transmission problems (Toyota service manual)
  5. A wiring issue (RepairPal; Sonnax says the code itself does not indicate an electrical fault)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

  1. Read all stored codes. Toyota's manual says to troubleshoot any other codes first, since they can cause P2757.
  2. Check the transmission fluid level and condition following your owner's manual's procedure, and look up when it was last serviced.
  3. Inspect the transmission wiring and connector for damage or corrosion, even though Sonnax notes the code usually isn't electrical.
  4. A shop scan tool with an active lockup test can command lockup on a test drive so you can see whether engine rpm stays steady when lockup is on.
  5. Solenoid resistance and operation checks need the solenoid out and your vehicle's specs; Toyota's Hilux manual lists 5.0 to 5.6 ohms at 68°F for that model's SLU solenoid, which won't apply to every vehicle.

Typical fixes

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

  • The transmission slips, shudders or won't shift properly
  • The fluid is burnt or full of debris
  • The code comes back after a solenoid or fluid service
  • Testing needs a dealer-level scan tool, line pressure checks or valve body removal

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

Is P2757 serious?

RepairPal rates it Urgent. Most often the torque converter just stops locking up, which costs fuel and adds heat, but a slipping lockup clutch or worn valve body can get worse, so get it diagnosed soon.

Can I drive with code P2757?

Gentle driving is usually possible, but check the fluid and avoid towing or hard driving. If the transmission slips or won't shift properly, get it checked before driving far.

Is P2757 always a bad solenoid?

No. Sonnax says shops often replace torque converters and several solenoids without fixing it, because on Toyota/Scion U340/U341 transmissions the usual root cause is wear in the valve body's lockup control valve bore. Toyota's manual also lists the valve body, torque converter clutch and low line pressure.

How much does it cost to fix P2757?

None of these sources give a repair cost. It ranges widely depending on whether it's a solenoid, valve body work or a torque converter, so get a written estimate after diagnosis.

Sources

  1. RepairPal: P2757 Torque Converter Clutch Pressure Control Solenoid Control Circuit (rated Urgent)
  2. Toyota Hilux (AN10, 2004-2015) repair manual: DTC P2757 Torque Converter Clutch Pressure Control Solenoid (via jdmfsm.info)
  3. Toyota C-HR service manual: Torque Converter Clutch Circuit Performance or Stuck OFF (P0741, P075B, P2757) (via tochr.net)
  4. Sonnax: Pinball Wizard: U341E/F TCC Slip Diagnosis (2016)

Last reviewed 2026-10-23. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.