P0934Hydraulic Pressure Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The pressure sensor signal sits below its valid window. Chrysler RFE transmissions feed the line pressure sensor with a 5 V reference and expect 0.35 to 4.75 V; P0934 sets when the signal stays at or below 0.35 V for 0.18 s, monitored continuously with the engine running. Typical reasons are a signal wire shorted to ground, a lost 5 V reference or a failed sensor. Ferrari also uses P0934 on its DCT, described as hydraulic pressure sensor signal too low. P0935 is the opposite high fault, P0932 the general circuit fault, P0933 plausibility and P0936 intermittent. Without a usable pressure signal the control usually raises pressure to a safe maximum, so shifts turn harsh.
- What you may notice
- Warning light on
- Harsh shifts due to default maximum pressure
- Possible limp mode
- Likely causes
- LikelySensor signal wire shorted to ground
- Possible5 V reference open or shorted
- PossiblePressure sensor or the solenoid pack carrying it failed
- RareControl module fault
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.