P1762 – Lock-Up Solenoid Stuck (Toyota)

Description

The ECM detected a stuck lock-up solenoid affecting torque converter clutch operation.

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Symptoms

Shuddering
Slipping
Harsh shifting
Failsafe mode
Check engine light

Causes

Stuck solenoid
Dirty ATF
Valve body blockage
Wiring issues

Diagnosis

Check ATF condition
Test solenoid movement
Inspect wiring
Scan TCM data

Repair

Replace solenoid
Clean valve body
Refill ATF
Repair wiring