The P0764 code in your 2022 Cadillac CT5 indicates intermittent problems with shift solenoid C in the 10-speed automatic transmission. Intermittent faults present unique diagnostic challenges as symptoms and electrical faults appear sporadically.
Understanding Intermittent Transmission Faults
GM's 10L80 transmission in the CT5 uses precision solenoids for gear selection. An intermittent code means solenoid C functions correctly most of the time but fails under certain conditions—temperature, vibration, or electrical load.
What Causes Intermittent P0764
- Loose connection affected by vibration
- Temperature-sensitive solenoid failure
- Marginally corroded connector pins
- Wire insulation damage causing occasional shorts
- TCM driver circuit intermittent failure
- Solenoid beginning to fail internally
Symptoms May Vary
- Sporadic shift quality issues
- Check engine light comes and goes
- Occasional gear selection hesitation
- Problems tied to temperature or load
- Intermittent transmission warnings
- Symptoms that clear themselves
CT5 Diagnostic Approach
Cadillac's diagnostic system stores detailed freeze frame data showing conditions when P0764 set. This information is crucial for intermittent fault diagnosis, helping identify patterns related to temperature, RPM, or vehicle speed.