The P0761 code in your 2021 Acura TLX indicates shift solenoid C is not performing correctly or is stuck in the off position. The TLX's 10-speed automatic transmission relies on precise solenoid operation for its quick, smooth shifts.
TLX 10-Speed Transmission
Acura's 10-speed automatic (shared with Honda) uses multiple solenoids for gear selection control. Solenoid C is one of several shift solenoids that direct hydraulic pressure to specific clutch packs. When stuck off, that clutch pack cannot engage properly.
Why Solenoid C Gets Stuck Off
- Open circuit preventing solenoid activation
- Solenoid mechanically stuck open
- Valve body passage blockage
- Electrical connector issue
- Contaminated fluid affecting solenoid
- Internal coil failure
How This Affects Your TLX
- Certain gears unavailable or delayed
- Harsh shift quality
- Check engine light on
- Transmission performance degraded
- Possible skip-shift behavior
- Sport mode may function differently
Acura Transmission Maintenance
The 10-speed transmission requires Honda/Acura ATF-Type 3.0 fluid. Fluid condition directly affects solenoid operation. Acura recommends transmission fluid service according to the maintenance minder system.