P0934
Hydraulic Pressure Sensor Circuit Low
What it means
P0934 means Hydraulic Pressure Sensor Circuit Low.
Where it lives
For P0934, the circuit described runs through the sensor. The description of P0934 reports a fault at the sensor.
Check these first
- A short to ground in the hydraulic pressure sensor circuit
- A pressure sensor signal wire grounded
- Corrosion at the pressure sensor connector
- A failed hydraulic pressure sensor
What to do next
- Read hydraulic pressure sensor voltage on a scan tool
- Test the pressure sensor signal wire for a short to ground
- Check the pressure sensor connector for corrosion
- Measure the sensor reference voltage
- Replace the sensor if the signal stays low
- Clear the code and retest
Look up another code
Enter a full code or a symptom. Press / to search. How to read a code
Type a code above, or start from a symptom or a common code.
Updated
Generic SAE J2012 definition. Last updated 2026-10-10.