Error code

OBD2 P0934

OBD2P0934
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Hydraulic Pressure Sensor Circuit Low.

Severity

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

Summary

P0934 indicates that the hydraulic pressure sensor circuit is reporting low input voltage to the transmission control module (TCM). This issue affects the automatic transmission's ability to adjust hydraulic pressure accurately.

Symptoms

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

Common Causes

  • Wiring issues, such as shorts to ground
  • Faulty hydraulic pressure sensor
  • Corrosion in electrical connectors
  • Poor installation of aftermarket components

Diagnosis

  1. Check for obvious damage in wiring harnesses
  2. Inspect connectors for water entry or bent pins
  3. Verify proper voltage and ground at the sensor
  4. Perform resistance and continuity checks on circuits

Fixes

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

FAQ

What should I do if my MIL is on and I have P0934?

Check for wiring issues, corrosion in connectors, or a faulty sensor. Consult a mechanic if unsure.

Can I drive with P0934?

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

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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