P0935
Hydraulic Pressure Sensor Circuit High
Transmission controls
Generic OBD-II
Medium
What it means
P0935 means the hydraulic pressure sensor is reporting a higher-than-expected signal to the transmission controller. Because that pressure drives shifting, a bad reading can cause harsh shifts or limp mode. A wiring short, a failing sensor, or a real pressure problem are the usual causes. The engine still starts and runs.
Medium
Can I keep driving? Usually — but harsh or delayed shifting and possible limp mode mean you should get it checked soon.
Common symptoms
What you'll notice
- Check-engine light on
- Harsh or delayed shifting
- Transmission slipping
- Transmission may enter limp mode
Common causes
Most likely first
- Faulty hydraulic pressure sensor (reading high)Likely
- Wiring or connector fault (short to voltage / open) at the sensorCommon
- Low transmission fluid level or pressureCommon
- Faulty transmission (hydraulic) pumpLess often
- Faulty transmission control module (TCM) — least likelyLess often
How to diagnose & fix
Work through it in order
- Check transmission fluid level and condition first.
- Inspect the pressure sensor connector and wiring for shorts to voltage or damage.
- Compare the sensor's reading to actual hydraulic pressure with a gauge.
- Replace the hydraulic pressure sensor if confirmed faulty.
- If the sensor is good, check the pump and TCM. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0935?+
The engine runs, but shifting can be harsh and the transmission may enter limp mode. Get it checked soon to rule out a real pressure problem.
Can I just clear P0935?+
It returns until the wiring, sensor, or pressure fault is repaired. Check the fluid level first.
Related codes
Often seen with P0935
Read & clear P0935 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX