P1790 Shift/Timing Solenoid Circuit
What does P1790 mean on a Toyota?
P1790 — Shift/Timing Solenoid Circuit. This Toyota-enhanced code applies to Camry, Corolla, RAV4.
Common causes of P1790
- Failed shift/timing solenoid
- Open or shorted solenoid circuit
- Sticking timing valve
- Contaminated fluid
- TCM driver fault
How to fix P1790
- Test solenoid resistance
- Command the solenoid and verify shift timing
- Check fluid condition
- Inspect the circuit
- Replace the solenoid after command proof