P1760 – Lock-Up Solenoid (Toyota)

Description

The ECM detected improper operation of the lock-up solenoid affecting torque converter clutch engagement.

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Symptoms

Shuddering
Slipping
Harsh shifting
Poor fuel economy
Check engine light

Causes

Faulty lock-up solenoid
Dirty ATF
Valve body blockage
Wiring issues
TCM driver fault

Diagnosis

Check ATF condition
Test solenoid resistance
Inspect wiring
Scan TCM data
Inspect valve body

Repair

Replace lock-up solenoid
Refill ATF
Clean valve body
Repair wiring