The P0788 code in your 2022 Toyota Highlander indicates intermittent problems with the shift timing solenoid in the 8-speed Direct Shift automatic transmission. Intermittent faults appear sporadically under specific conditions.
Highlander Transmission Quality
Toyota's 8-speed automatic in the Highlander is designed for reliable family transportation. An intermittent shift timing solenoid fault suggests the circuit or component functions normally most of the time but fails under certain conditions.
Causes of Intermittent P0788
- Loose electrical connection
- Temperature-sensitive component
- Marginally corroded connector
- Damaged wire insulation
- Early-stage solenoid failure
- TCM driver intermittent fault
Symptoms May Vary
- Occasional shift timing issues
- Sporadic check engine light
- Intermittent harsh shifts
- Problems tied to temperature
- Symptoms that clear themselves
- Inconsistent driving experience
Toyota Reliability Context
Toyota transmissions are known for exceptional reliability. Intermittent solenoid codes are uncommon and typically indicate electrical connection issues rather than fundamental transmission problems.