Code Definition

P2757 — Torque Converter Clutch Pressure Control Solenoid Performance (Shift Solenoid Valve SLU)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Toyota

About P2757

P2757 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Toyota vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2757 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2757 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The torque converter clutch pressure control solenoid, designated SLU on Toyota transmissions, is a linear solenoid that regulates the hydraulic pressure applied to the torque converter lockup clutch. Rather than switching fully on or off, it is current controlled so the module can apply the clutch progressively and hold a small, deliberately controlled amount of slip for smooth engagement. The control module continuously calculates actual converter slip by comparing engine speed against input turbine shaft speed, and DTC P2757 sets when the measured slip fails to respond to the commanded sole...

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