Error code

OBD2 P0935

OBD2P0935
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Hydraulic Pressure Sensor Circuit High.

Severity

highDriving may be possible but expect poor shifting and potential gear lockout issues.

Summary

P0935 indicates that the hydraulic pressure sensor circuit is reporting an abnormally high voltage to the transmission control module (TCM). This issue affects the automatic transmission's ability to regulate hydraulic pressure accurately.

Symptoms

  • Malfunction Indicator Light (MIL) illuminated
  • Harsh shifting under light acceleration
  • Delayed or soft shifting during hard acceleration
  • Potential gear lockout leading to poor acceleration or excessive engine speed

Common Causes

  • Short circuit in the sensor wiring harness
  • Water damage or bent pins in connectors
  • Internal short within the hydraulic pressure sensor itself
  • Over-sensitive ECM rejecting minor variations in signal voltage

Diagnosis

  1. Check for TSBs (Technical Service Bulletins) related to P0935
  2. Inspect wiring harnesses for damage or water entry
  3. Verify proper voltage, ground, and signal readings at the sensor connector
  4. Disconnect the sensor and check circuit continuity end-to-end

Fixes

  • Repair damaged wiring harness or connectors
  • Replace faulty hydraulic pressure sensor if necessary

FAQ

What should I do if my MIL is on and I have P0935?

Start by checking for TSBs, inspecting wiring harnesses, and verifying voltage readings at the sensor connector. If issues persist, consult a professional mechanic.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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