P1719 – ATF Pressure Switch (Toyota)

Description

The ECM detected a malfunction in the ATF pressure switch affecting hydraulic pressure monitoring.

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Symptoms

Harsh shifting
Delayed shifting
Slipping
Failsafe mode
Check engine light

Causes

Faulty pressure switch
Dirty ATF
Valve body blockage
Wiring issues
TCM signal fault

Diagnosis

Test pressure switch
Inspect wiring
Check ATF condition
Scan TCM data
Inspect valve body

Repair

Replace pressure switch
Refill ATF
Clean valve body
Repair wiring