Pressure Control Solenoid C Electrical
What it means
P0798 means the transmission control module detected an electrical fault in the pressure control solenoid C circuit. This solenoid regulates hydraulic pressure inside the automatic transmission, so the fault can cause slipping or poor shifting. The engine still starts and runs; the issue is electrical (wiring, connector, or the solenoid itself).
Can I keep driving? The car still drives, but slipping or poor shifts from a pressure fault can overheat the transmission — have it repaired soon.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check-engine light on
- Slipping transmission
- Harsh, delayed, or missed shifts
- Reduced fuel economy
Common causes
Most likely first
- Damaged, shorted, or open wiring in the solenoid C circuitLikely
- Poor or corroded connector at the solenoidCommon
- Failed pressure control solenoid CCommon
- Failed transmission control module (TCM) — least commonLess often
How to diagnose & fix
Work through it in order
- Confirm the code and read freeze-frame data.
- Inspect the solenoid C wiring and connector for damage or corrosion.
- Measure the solenoid resistance and check the circuit for opens or shorts.
- Replace the solenoid if it is out of spec.
- If wiring and solenoid are good, diagnose the TCM. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0798?+
Can I just clear P0798?+
Related codes
Read & clear P0798 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.