P094CHydraulic Pump Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The pump is commanded on but does not deliver: it does not turn, turns too slowly or produces too little pressure. The module judges this from pressure or speed feedback. No manufacturer documents this exact code publicly. Mercedes reports a comparable condition of the electric auxiliary oil pump on the 722.9 automatic under P0944; its test plan checks connector and fuse, supply voltage, CAN lines and software, then a check valve in the converter housing, before the pump is replaced. Hyundai lists a stuck high-flow pump on its 8-speed DCT as P193E71. CARB requires functional checks on outputs. P094B is the opposite fault, P094A the driver, P0944 the pressure loss of the whole unit.
- What you may notice
- Warning light on
- Engine restarts at once or stop-start not available
- Delayed engagement or lost drive
- Likely causes
- LikelyAir in the pump after service or a suction leak
- PossibleSeized or failed pump motor
- PossibleBlocked strainer or leaking check valve
- RareSupply or relay fault stopping the pump
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.