The P0760 code in your 2020 Acura TLX indicates a malfunction with shift solenoid C. Your TLX uses a 9-speed automatic transmission (models with 2.4L) or 10-speed automatic (with Type-S 3.0T), where shift solenoid C controls specific gear applications, typically in the higher gear ranges.
Shift Solenoid C Function
Shift solenoid C is part of the complex hydraulic control system that manages gear changes. In multi-speed automatics, solenoid C often affects higher gears like 3-4 shifts and above. When this solenoid malfunctions, those specific gear applications are compromised.
Common Causes
The solenoid may have failed electrically (open or shorted coil) or mechanically (stuck). Wiring issues between the TCM and solenoid. Contaminated transmission fluid affecting solenoid operation. Valve body problems. Connector corrosion at the transmission.
Symptoms in Your TLX
Shifts in higher gears may be harsh, delayed, or absent. The transmission may have difficulty with highway cruising gears. Shift flare during affected gear changes. Check engine light with P0760 stored. Lower gears may feel normal.
Acura Diagnostic Process
Using Honda HDS, check shift solenoid C operation and circuit status. Monitor shift patterns—note which specific gears are affected. Test solenoid resistance against specifications. Check transmission fluid level and condition. Inspect connector terminals for damage.