OBD Codes List

Diagnostic reference · P0934

P0934

Hydraulic Pressure Sensor Circuit Low

System
Transmission (P code)
Lamp
Check Engine Light
Category
Powertrain - Transmission

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

  1. Read hydraulic pressure sensor voltage on a scan tool
  2. Test the pressure sensor signal wire for a short to ground
  3. Check the pressure sensor connector for corrosion
  4. Measure the sensor reference voltage
  5. Replace the sensor if the signal stays low
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.